I have a number of Silver and Bronze Age keys up on eBay this week including:

http://www.ebay.com/sch/m.html?_ipg=200&_ssn=comicnut_1&_sop=1

Avengers #66 CGC 9.2 (ULTRON + 1ST APPEARANCE OF ADAMANTIUM)
Batman #189 CGC 5.5 (1ST SILVER AGE SCARECROW)
Detective Comics #298 CGC 5.5 (ORIGIN & 1ST APPEARANCE OF SILVER AGE CLAY FACE - MATT HAGEN)
Detective Comics #359 CGC 3.0 (ORIGIN & 1ST APPEARANCE OF BATGIRL)
Dr. Strange #1 CGC 9.4 (1ST APPEARANCE OF SILVER DAGGER)
Flash #139 CGC 4.0 (ORIGIN & 1ST APPEARANCE OF REVERSE FLASH)
Green Lantern #87 CGC 8.5 (1ST APPEARANCE OF JOHN STEWART)
Marvel Premiere #1 CGC 7.0 (ORIGIN OF WARLOCK)
Ms. Marvel #1 CGC 9.4 (1ST CAROL DANVERS AS MS. MARVEL)
New Mutants #87 CGC 9.8 (1ST CABLE)
Spectacular Spider-Man #64 CGC 9.6 (1ST CLOAK & DAGGER)
X-Factor #5 CGC 9.8 (1ST BRIEF APOCALYPSE APPEARANCE)
X-Factor #6 CGC 9.8 (1ST FULL APOCALYPSE)
X-Factor #24 CGC 9.8 (1ST ARCHANGEL & ORIGIN OF APOCALYPSE)