Sugar and Spike and Spike" series...is the most charming thing I've ever seen in comics." DC attempted to license "Sugar and Spike" as a syndicated newspaper strip but was unsuccessful. Sales on the "Sugar and Spike" issues of "The Best of DC" were strong enough that DC announced plans for a new ongoing series featuring the characters. The project was never launched for unknown reasons. Mayer had an agreement with DC that no one else could write Sugar and Spike. However, they have occasionally made cameo appearances in modern comic books. They are rescued by the underwater heroine Dolphin in "Showcase" #100. They
Modern Age of Comic Books series, were sold for thousands of dollars. Mainstream newspapers ran reports that comic books were good financial investments and soon collectors were buying massive amounts of comics they thought would be valuable in the future. Publishers responded by manufacturing collectors’ items, such as trading cards, and “limited editions” of certain issues featuring a special or variant cover. The first issues of Marvel Comics' "X-Force, X-Men" vol. 2, and "Spider-Man" became some of the first and most notorious examples of this trend. Another trend which emerged was foil-stamped covers. The first Marvel comic book with a foil-stamped cover was the third