I previously bought 3 741's from
MiningBaby. They showed up new and packaged the same as other 741's I received from distributors. You can check their untrusted feedback in their trust to see details.
There is a lot of liability and risk involved that I do not feel comfortable with offloading to others, with nothing short of hiring a lawyer to draft a contract.
That makes sense. It is also something to consider for your own risk. I'm guessing though that you figure it will last long enough to ROI your Generator and equipment. Who knows in the long run you might find that an acquaintance or family/friend who decide to jump in. Hosting for these people would be a lot less risk as you could talk with them about the risks beforehand.