Most are in near mint condition, with a few exceptions like the dust cover on the Michael Jackson book, and softcover unless noted. If you want to buy a bunch and make an offer go for it.
I also have a copy of Michael Dawson’s Mashmaker which it seems has become a bit of a rarity so I’m not exactly sure what to do with it (I see one on eBay for $200). If someone has a particular interest in this one send me a note.