Now, I've noted a seller, thesaint00, that bears a striking resemblance to my old friend The Negative Zone (thewatcher000). Through eBay, I confirmed thesaint00's contact information and the seller is from Seattle. The Negative Zone was from Seattle.
Compare auction listings:
Negative Zone auction for which I paid and never received book
Current thesaint00 auction for same item I never received
Interesting how they can currently offer the same items they can't seem to send to their old customers. Clearly, they feel no obligation to send items from the old seller account. Their attitude is obviously, "Why bother to send items that people paid for once the seller account is trashed anyway?"
If this is the same seller -- and I'm 99% sure it is -- I can't believe eBay can let a seller blatantly rip people off then just set up shop under another (thinly veiled) name.