You didn't mention Amazon's twisting of the knife: even if someone does find your book there in a search, Amazon lists the link to the used sellers along with the link to the new product.
Hollywood by Charles Bukowski
Buy new: $16.00 - 58 Used & new from $4.55
If I was a publisher, no way I'd go for that shit.
Of course, as a buyer, I use Amazon all the time...
Amazon is a good way to generate revenue and get an author better known--that's about it. I hope you don't use Amazon to buy used small-press books. If you do, then you're helping to kill the type of literature you claim to care about.