Tom, I didn't realize that the missus was a Power Seller and I didn't pay attention to the difference in fee structure there. I seemed to gravitate towards the non-PS nearly 9% final value fee for $10+ auctions. I thought, shoot, you sell something that's $500, you're paying eBay $50 just so they can have it up there. While eBay is a phenomenal outlet for exposure, $50 also is a pretty significant amount of money. I suppose for one-shot sellers like myself, it makes Craig's List much more attractive than it ever has been (ignoring the lack of hard security there).
I can relate to stupid comments. I never ship to Canada, but only because I like that I can cheaply and easily track UPS/FedEx to their doorstep, with a signature, and have a local police department on hand if they claim they did not receive it or otherwise try to scam me. But, I'll routinely get "Do you ship to Canada?" questions. Nope. Read the red, size 18, bold type under the item picture.
And, I guess I never really thought about the feedback issue--but yeah, that's a huge problem. Many times my positive buyer feedback will cause them (automated maybe?) to shoot a reply positive to me. I cannot see the utility in this at all.
And, after reading everyone's responses, I feel lucky that I sold my old GPS on it, without hassle, to a good buyer who paid $600 without so much as a peep. I can only imagine the problems that could have occurred. Between deadbeat or moronic buyers, it seems like it's not much better than going to a flea market.