[pavel_lishin]

> Thrift stores tend to attract a very specific market, and that doesn't need to be your market.

This is part of the reason I started off my comment by imagining what an idealized HN reader would donate. That's the kind of person you want to attract. But I genuinely wonder if there are enough of those people - the fact that you're paying them a pittance turns a gift of generosity (e.g., donating to a cancer charity) into a job.