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.