It’s one of the few officially licensed products Watterson ever approved. I’ve read that the print run was only 2,500.
Back in the late 90s, I found it on Amazon used…for about $20. Pretty good return on my investment, eh?
Most copies I see now go for about $2,500. It would have to be pretty pristine to go for $10,000. (And of course, something is only worth what you actually sell it for.) If mine were in a book store, it could probably pass for brand new. There’s a tiny amount of discoloration on the top right corner along the pages. But nothing is dog-eared. The soft cover isn’t bent or wrinkled.
It’s actually a pretty good book. For obvious reasons I don’t use it any more. In fact, I keep it in a safe deposit box.