This is a case where "greed" is looking for "stupidity" - obviously he won't have any luck here.
My MIL has a bunch of - well, let's just call it what it is: Crap - and she sets her prices at the yard sales waaaaay too high AND she won't negotiate. Then she wonders why she has to haul the crap back in the garage. I stay far away when she has a yard sale. The sad thing is that her garage is so full to overflowing that she needs to pay for a storage unit. I don't think I need to tell you what's in it.....