Look at the tools the prospective borrower has. If they're good quality and well maintained, I'd be more willing to lend him/her a tool of mine.
When the Domino came out, I borrowed one from a friend of mine to see if I wanted to buy one. Used it enough to get a feel for it, and bought one. Returned his clean and in good shape.
I was doing a woodworking favor for a friend (at his house) and I realized I had forgotten a saw. He pulled out one he had and said "Here, use this." I said, "No, I prefer to use my own tools." and went home and got mine. As you could guess, his saw was typical garage junk.
Mike
Go into the world and do well. But more importantly, go into the world and do good.