Seeing as how Marvel is reviving its Treasury Edition format for a special of its new Spidey title, how about a look back at the original bad boys?
Picking up these huge-format comics, and their DC equivalent Limited Collectors' Editions, was always a treat back in the 1970s. Sure, they'd set you back a buck and some change, but you felt like you were really getting something. I still have all mine.
Scans from the Grand Comics Database.