The Death and Return of Superman saga is so 90s, and also credited with the beginning of the publishing gluttony that paved the way for the market crash later in the decade. One such 90s thing about this set is the number of "Collector's Editions" released. I have most of these and enjoy them, but it has been frustrating finding them graded. These editions crowed just about every comic shop in America but I never see any raw 9.8 candidates. Most of the graded examples are also listed with high BIN prices, so I wait patiently for regular auctions.
All four Superman titles cover dated June, 1993, were released with Collector's Editions along with regular or newsstand counterparts, starting with Adventures of Superman #500. AoS #500 was the prelude to the "Reign of the Supermen!" storyline, introducing four new Supermen. AoS #500 Collector's Edition came sealed with a trading card.
I believe AoS #500 was the most ordered and distributed comic book of 1993. I had my eye on a few eBay auctions for 9.8 graded editions recently and was surprised to see them realize $50 to $75.
The next Collector's Editions were the four Superman titles that followed AoS #500 with Die Cut covers, these editions also came with a centerfold poster.
Then the real Superman finally returned, with two more (and shinny) Collector's Editions for Superman #82 and Adventures of Superman #505.
What I have thus far.
I just need the Collector's Editions of Superman #78, Adventures of Superman #501 and #505. I also need a scanner.
As of this writing, AoS #505 has only 1 9.8 listed for both the regular and Collector's Edition.