Sure, $20 as collateral for 5 tBTC sounds OK to me...
You can either pick a trusted forum member to hold the collateral, or you can fund this bitcoin address:

bc1qp0ugpnscaeszzjxd6cgas7a528f52jrwdecw3v

As soon as either the trusted forum member tells me the collateral is secure, or if the transaction funding above address has 2 confirmations, i'll fund ms3Q8h3KhBQ9cEomjmMvRa66AV7RdwMasd with 5 tBTC

As discussed above:
I want the tBTC back within 1 month and (transaction) fees are payed by you when i return the collateral...

I have no idear to be honest... Like i said, it's been a long time since i mined on the testnet. tBTC is without actual value, i guess the equivalent of $50 in BTC, LTC, ETH,... would allow me to mine 10 tBTC in case you'd run away?

I have no idear if this is to much or to little, it's just an incentive for you to give the tBTC back once your tests are finished

It's only collateral by the way (not a sale), if you give the tBTC back within a month, you'll get everything back (minus transaction fees offcourse).

I used to mine on the testnet a long time ago, and have 100+ tBTC in my testnet wallet. I use this tBTC to fund my own faucet (https://tbtc.mocacinno.com). I could potentially LEND you 10 tBTC for a while (no intrest), but i would take some collateral which you could get back after you return the tBTC.
I'm not interested in selling the tBTC, since i use it to fund my own faucet, but i don't really need the funds for at least a couple of months (depending on wether my faucet gains popularity or not).

So my terms:

• find a trusted FORUM escrow, or, if you trust me: give some decent collateral directly to me (it should be enough to rent sufficient hashrate to mine 10 tBTC + something for my efforts).
• After the collateral is secured, i'll transfer 10 tBTC
• Within 1 month, you return the 10 tBTC to me, after the returning transaction is confirmed you get your collateral back
• You pay all fees (escrow, tx fees,...)

If you agree, please accept this deal on this forum (not in PM). I'll be online for the next 2 hours.

He corroborado con el WTC de BCN que efectivamente ese negocio no está ubicado en la dirección indicada (de hecho, la planta entera es ocupada por una sola empresa).

Archivo:
http://archive.ph/iP3Y1
https://web.archive.org/web/20191213103226/https://bitcointalk.org/index.php?topic=5209044.msg53327519

Más allá del Photoshop mal elaborado, normalmente uno ha de ser muy precavido y desconfiado de los negocios ofrecidos que, lejos de tratarse de manera abierta, se canalizan luego a canales privados como Telegram.

What is exchange rate for western union
and accept you escrow?