Deb,
I don't sell much (actually I'm having the same problem as you) but I do buy quite a bit so please take my comments with a grain of salt.
After reading your ad, it appears your terms of sale are.. well, not user (perhaps "buyer" is a better word) friendly. They're kind of ambigious to be honest and sound harsh and strict. Perhaps if you worded them so they sound more...gentle?
Please don't take offense, I don't mean to sound critical, nor do I proffess how to sell.
Crazy Orchid Lady
www.crazyorchidlady.com