I had a Rolling Stones cover that got pulled and the Bowie Diamond dog with a d*ck sleeve.
I'm not sure about the Rolling Stones, but if you had the unretouched Guy Peellaert Diamond Dogs cover it would definitely be worth some dough. The Diamond Dogs unretouched cover is a real collector's item---and if you had a proof of it that probably would have been worth even more. By the way, the Diamond Dogs cover was a swipe---at least the use of the artist. Mick Jagger had mentioned to Bowie that he had seen some of Guy Peellaert's work and was going go use him for a Stones album cover. Bowie beat him to the punch. The cover was censored.

Later in the same year Roxy Music got around the censorship of their Country Life album cover by shrink wrapping it in solid green cellophane.