What are you surprised has never been reprinted?

[inferno]

i don't think groo the wanderer has been collected

The first half or so of the Marvel/Epic stuff was released in tpb, but not since the 90s

[Bicycle-Repairman]

Some series mentioned, and some additional ones I'd like to see:

Black Panther from Jungle Action (have several comics, would like a complete collection).

Deathlok (original series. Don't think they've ever reprinted it.)

Deathlok Masterworks Vol. 1 has already been released and Black Panther Masterworks Vol. 1 reprinting Jungle Action #6-24 is due out later this year.

[McFarlane's Green Hulk]

Mark Gruenwald's Captain America run...
Roger Stern/John Buscema's Avengers...
Bill Mantlo's Hulk run...
David Michelinie's Iron Man run...both of them...

A guilty pleasure would be the Thing solo series...

Re: to myself about the Iron Man stuff:
I was surprised this month with the Iron Man TPBs that came out...
Armor Wars Prologue by Michelinie/Layton from #215-224; Armor Wars I by Michelinie/Bright/Layton from #225-232. Byrne's Armor Wars II is coming out soon, so all that's left is the wheelchair Tony storyline...