Doujin Hoops Collaboration 2
Circle: Doujin Hoops
Not much for a description on this one as I don't want children to find this in internet searches. Let's just say that the art is usually pretty bad in it.
Approximated Value: $20
Doujinshi from this series are somewhat difficult to obtain at times, but that problem appears to be leveling off, as such this doujinshi has dropped greatly in value since I acquired it.
There are other websites listed in the back of the book: