Heritage Comics is having their auction this weekend. Among some of the Pérez-related auction are his first published professional comic book art in ASTONISHING TALES #25 (Aug 74). The other interesting item is the 30 cent variant to INHUMANS #4:

INHUMANS #4 (30 Cent Variant) (Apr 1976) Marvel Comics

The Inhumans #4 35 Cent Price Variant (Marvel, 1976) CGC NM 9.4 White pages. While the vast majority of the copies of this issue sport a 25 cent cover price, this is one of the scarce variants that was used to test whether the public was ready to accept a 5 cent price increase. These 30 cent editions were only distributed in a few cities and high-grade copies are exceptionally difficult to locate. Try to find another! Overstreet values on these issues are extremely conservative compared to what these copies actually sell for. George Perez art.