Trezor from eBay, trustable?

[bitart]

Guys, please help me.
I've searched the forum and found this thread:
https://bitcointalk.org/index.php?topic=802831.20
I was about to post my question there but the forum reminded me to start a new topic, because that's an old topic.

If I can buy a trezor 2nd hand (or from someone locally) can it be safe after I update the firmware on it (if possible) with a factory firmware?
I know that this is really dangerous to use someone else's trezor, but if I can reset the device and if I can upload a brand new firmware, it can be useable after?
Reaseon:
I would like to test if I can get used to use a kind of hardware like this to store bitcoin. At first, I would test it with some satoshis, and if it's easy to use I would buy a genuie one from the trezor shop.

Thanks for the answers in advance!

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[Velkro]

If I can buy a trezor 2nd hand (or from someone locally) can it be safe after I update the firmware on it (if possible) with a factory firmware?

Only then, but its a must to wipe it out and install factory firmware. But this is not 100% safe because he could modify it hardware-wise not only software-wise.
So generally to store bigger amounts there is no point in buying from 2nd hand, only directly from company that makes them.

[bitart]

If I can buy a trezor 2nd hand (or from someone locally) can it be safe after I update the firmware on it (if possible) with a factory firmware?

Only then, but its a must to wipe it out and install factory firmware. But this is not 100% safe because he could modify it hardware-wise not only software-wise.
So generally to store bigger amounts there is no point in buying from 2nd hand, only directly from company that makes them.

Thanks Velkro, this is just what I wanted to hear.
The second hand is just for testing purposes, if it turns out that it's easy to use and I like it, I'll buy a new, a white one from the authentic shop

[LabaDaba]

I hope it is at least significantly cheaper than new one? Otherwise no point, it should be safe after total wipe like Velkro said.

[zend7]

When you buy a hardware wallet you should always opt in for a BRAND NEW FACTORY SEALED wallet even if it's priced much higher than second hand wallet. Check youtube videos, there are a lot of them which shows how to use hardware wallets. Almost all companies who produce hardware wallets have such videos.

I don't suggest you buy it from Ebay even when it says it's brand new as the user  who sells it may have tickled with it. Always buy from the official website, at least that's what I did when I bought a ledger last year in August. No regrets so far ,keeping more than 4 BTC there now.

[bitart]

When you buy a hardware wallet you should always opt in for a BRAND NEW FACTORY SEALED wallet even if it's priced much higher than second hand wallet. Check youtube videos, there are a lot of them which shows how to use hardware wallets. Almost all companies who produce hardware wallets have such videos.

I don't suggest you buy it from Ebay even when it says it's brand new as the user  who sells it may have tickled with it. Always buy from the official website, at least that's what I did when I bought a ledger last year in August. No regrets so far ,keeping more than 4 BTC there now.

Thanks for the video idea. I've just finished to read the complete Trezor user manual, it seems pretty straightforward. Of course, if I want to keep such a high amount in Trezor, it will be a brand new factory one device, the second hand thing was just an idea to decide if it fits me or not.
I'll check the videos and afterwards the only question will be the colour

[unholycactus]

When you buy a hardware wallet you should always opt in for a BRAND NEW FACTORY SEALED wallet even if it's priced much higher than second hand wallet. Check youtube videos, there are a lot of them which shows how to use hardware wallets. Almost all companies who produce hardware wallets have such videos.

I don't suggest you buy it from Ebay even when it says it's brand new as the user  who sells it may have tickled with it. Always buy from the official website, at least that's what I did when I bought a ledger last year in August. No regrets so far ,keeping more than 4 BTC there now.

Thanks for the video idea. I've just finished to read the complete Trezor user manual, it seems pretty straightforward. Of course, if I want to keep such a high amount in Trezor, it will be a brand new factory one device, the second hand thing was just an idea to decide if it fits me or not.
I'll check the videos and afterwards the only question will be the colour

It depends on how much Bitcoin you are going to store.
If a hardware wallet is your go to option, you should always get it directly from the manufacturer.

If you want to save money, you can always chose another option like paper wallets.

[kolloh]

Yeah, I'd probably want to just order an official one from the manufacturer.

However, you will mostly likely fine as long as you reset/upgrade the firmware before using the device to ensure it was not tampered with. I believe Trezor would give you a warning for unsigned firmware anyhow.

[numismatist]

If you want to save money, you can always chose another option like paper wallets.

This! True crypto doesn't require any hardware at all. It's pure math.
(just keep an eye on partially sendings, missing return adresses)

Regarding a used Trezor for daily useage I believe it is totally secure. Reflash it, take a closeup look of the casing. Has it been opened?
The attack surface of those devices is really small. I would be more worried about other portable devices like dedicated cellphone since they arrive backdoored by manufactorer, or get a fresh backdoor upgraded via wireless update. Stealing data from phones seems to be common practise, everybody is trying that.
They got invented for stealing data.

[bitart]

If you want to save money, you can always chose another option like paper wallets.

This! True crypto doesn't require any hardware at all. It's pure math.
(just keep an eye on partially sendings, missing return adresses)

Regarding a used Trezor for daily useage I believe it is totally secure. Reflash it, take a closeup look of the casing. Has it been opened?
The attack surface of those devices is really small. I would be more worried about other portable devices like dedicated cellphone since they arrive backdoored by manufactorer, or get a fresh backdoor upgraded via wireless update. Stealing data from phones seems to be common practise, everybody is trying that.
They got invented for stealing data.

Thanks!
So it seems I can be more secure if I use the second hand Trezor like a hot wallet and a brand new for bigger amonunt and forget about web based mobile wallets...

Something else:
I had a look at the official shop of Trezor (https://shop.trezor.io)
It seems that they're out of stock now (every colour)
I had a look at amazon too, but the price is double (!) compared to the official shop...
on trezor.io, you can get $99 + shipping, on amazon, it's nearly $200
Seems I should wait for the official shop, they estimate the delivery for March 2017...
(it seems that there's no Trezor on ebay at the moment...)

[Kemarit]

If you want to save money, you can always chose another option like paper wallets.

This! True crypto doesn't require any hardware at all. It's pure math.
(just keep an eye on partially sendings, missing return adresses)

Regarding a used Trezor for daily useage I believe it is totally secure. Reflash it, take a closeup look of the casing. Has it been opened?
The attack surface of those devices is really small. I would be more worried about other portable devices like dedicated cellphone since they arrive backdoored by manufactorer, or get a fresh backdoor upgraded via wireless update. Stealing data from phones seems to be common practise, everybody is trying that.
They got invented for stealing data.

Thanks!
So it seems I can be more secure if I use the second hand Trezor like a hot wallet and a brand new for bigger amonunt and forget about web based mobile wallets...

Something else:
I had a look at the official shop of Trezor (https://shop.trezor.io)
It seems that they're out of stock now (every colour)
I had a look at amazon too, but the price is double (!) compared to the official shop...
on trezor.io, you can get $99 + shipping, on amazon, it's nearly $200
Seems I should wait for the official shop, they estimate the delivery for March 2017...
(it seems that there's no Trezor on ebay at the moment...)

Just keep us updated if you buy a second hand Trezor for testing purpose only
but I don't have the luxury to get one now They are probably out of stock
because they will be releasing Trezor 2 with Trezor Core:

TREZOR Core includes a micropython interpreter enabling community programmers to write the code in a beginner-friendly Python language. This new software stack will allow developers to flash their own firmware with their own header and welcome screen.

Here's the official blog:

https://blog.trezor.io

[bob123]

Yeah, I'd probably want to just order an official one from the manufacturer.

However, you will mostly likely fine as long as you reset/upgrade the firmware before using the device to ensure it was not tampered with. I believe Trezor would give you a warning for unsigned firmware anyhow.

I wouln't rely on a warning of unsigned firmware.. There are possibilities to get your fake firmware "signed"..
or at least to let the user think it signed, even tho its not.

But for test purposes its definetly fine with new flashed firmware on a 2nd hand trezor (as far as it wasnt opened or anything like that.. )

[GameunitsSEO]

Better buy some Ledger Wallet 

Cheap and very secure.

[bitart]

If you want to save money, you can always chose another option like paper wallets.

This! True crypto doesn't require any hardware at all. It's pure math.
(just keep an eye on partially sendings, missing return adresses)

Regarding a used Trezor for daily useage I believe it is totally secure. Reflash it, take a closeup look of the casing. Has it been opened?
The attack surface of those devices is really small. I would be more worried about other portable devices like dedicated cellphone since they arrive backdoored by manufactorer, or get a fresh backdoor upgraded via wireless update. Stealing data from phones seems to be common practise, everybody is trying that.
They got invented for stealing data.

Thanks!
So it seems I can be more secure if I use the second hand Trezor like a hot wallet and a brand new for bigger amonunt and forget about web based mobile wallets...

Something else:
I had a look at the official shop of Trezor (https://shop.trezor.io)
It seems that they're out of stock now (every colour)
I had a look at amazon too, but the price is double (!) compared to the official shop...
on trezor.io, you can get $99 + shipping, on amazon, it's nearly $200
Seems I should wait for the official shop, they estimate the delivery for March 2017...
(it seems that there's no Trezor on ebay at the moment...)

Found a new webshop where they accept Paypal and you can buy Trezor, it seems like an official bitcoin webshop.
Do you know it, have you ever bought anything from them? Is it a trustable?
https://store.bitcoin.com/collections/hardware-wallets/products/trezor?variant=19194849091
The price of the Trezor is the same as in the official Trezor webshop, but at Trezor's shop you can only pay with bitcoin.
Amazon is far too expensive