this in bold
and logistically, this sounds like a nightmare....
It does. It's a great premise but people will ultimately use the lending service as a way to sell coins if the service provides market valuation and will be left with coins they might not want.
I think than the lender would want to want to own those coins for it to work.
For example. I would love to lend some btc for some satori chips (valued at $22.5 a piece) I would pray that the lender defaulted. That would put a roll valued at 625. Its just slightly under market in my eyes correct me if I am wrong.
But if a lender values a lendees items at 10% under market price. I think that is fair if the lender wants to buy the items