We have, every so often, a "wish list" kind of thread for TP's/HC's you want a company to reprint. This isn't quite that.
Instead, what items do you just have trouble believing haven't been reprinted?
1) Black Panther: Panther's Rage (1970's Jungle Action issues by Rich McGregor, Rich Buckler, & Billy Graham). Classic stuff I've heard about for decades, completely unavailable except under original cover.
2) The "Pocket Universe" Superboy stories from right after Byrne's Man of Steel, including Legion of Super-Heroes (Baxter) #37-38. . It'll never be reprinted now, but these issues were kind of hot for a couple of years.
3) ROG-3000 and those other pre-Marvel Byrne comics (what was it, Speed Buggy or something?). With how popular Byrne has been, I can't believe no one has ever snapped up the reprint rights to these.
4) Marvel Visionaries: Barry Windsor-Smith. I mean, Dark Horse has a cottage industry of repackaging WS's Conan, yet many Marvel stories from the same time period (Ka-Zar in Astonishing Tales, for example) have never once been reprinted? Don't they like money?
5) Superman v. Muhammad Ali (Neal Adams), though the artist claims this might be changing soon.
6) Marvel Masterworks: Not Brand Ecch. Come on, now.
Any other surprise omissions out there?