Small UK group buy Block Erupter USB @ 1.99 BTC + taxes/duty & postage

[darklight]

You can read this thread where some people have run the numbers https://bitcointalk.org/index.php?topic=195004.20

Basically theres a chance it will never be profitable at the current price, and in the best case you are probably looking at around a year to make your money back. Personally I would avoid them like the plague

[piit79]

I am interested if there are any left, but what is the ROI on this and over what period of time if I only buy 1?

Anywhere I can find this info?

According to my numbers at the current difficulty and 300 MH/s it will make ~0.013 BTC per week.
-- At a very moderate 5% difficulty increase per retargetting interval (every ~12 days) you will make ROI by the end of April 2014
-- However, change that to 8% (which is much more likely) and you will make ROI in the beginning of June 2016.

This is more of a hobby mining device, you will not make any money with it

(Please anybody correct me if I'm wrong!)

[piit79]

If anyone is willing to loan me, I'd pay back the first 4 BTC I make per unit. So for each unit you earn 2 BTC back.

It's quite a hefty amount to loan I know but if anyone would consider it pm me and we can talk about it.

I would love to help you, but unfortunately you will never mine 4 BTC with the unit... Read my post above.

[TomHartburg]

Yea, I just did, did some of my own calculations and realised it's utterly pointless

I love the idea of a super low power usb miner, but at 300 mhash's and that price it is pointless.