All of them were in quite decent condition, with most actually appearing to have been unread. Except for some minor shopwear, the only problem was that there was some old label-type sticky gunk on the back of one, and it peeled up some of the cover of Red Planet, which was indeed exceedingly annoying...
The artwork included 7 nice Darrell K. Sweet covers, one by Lee Rosenblatt—a funky early-1970s-looking Starman Jones—and an uncredited Farmer in the Sky. Do I have other copies of these books with covers of very close variation? Yes. But do I like to maintain a pretty sizable Heinlein collection? Yeah...
Enjoy!
Rafeeq