Back in 1999 DC published this comic that was basically an anthology of short elseworlds stories (a lot of comedy ones),but after printing the issue DC decided that one particular story could cause a lot of problems & pulped the whole run except a few issues that were already shipped to the UK (estimated at somewhere between 500 & 1000 issues).
The story in question was about Clark Kent as a baby with a baby sitter trying to catch him (kinda like the movie Babys day out) and ended up with Superbaby being microwaved!
DC felt the backlash from a baby being microwaved could be too much!
I think Wizard value this issue at around $200 but I've heard of it going for a lot more!
The starting price is around $36!