Alright, 10k for an AF15 1.0 or ASM 1 5.0.....hmmm. Well, the old adage is to buy the highest grade you can afford, yes? But, in this case, I'm not so sure based on the two books provided. IMO I'd save up a bit more coin and buy something like a 1.8-3.5 AF15, versus ASM 1 in 5.0. Yeah, AF15 has cooled off a bit, especially in lower grades (4.0 down). Now might be the time to buy! Sure, ASM 1 is doing its catchup work these days as well, as it should. But over the long haul, AF15 is the KING of the Silver Age of Marvel, hands down! 1st appearance, origin, legendary "great responsibility" quote and iconic Jack "The King" Kirby cover! Not to mention tough book with the dark parts of the cover. ASM 1 is a great book, but doesn't have much else going for it that AF15 doesn't. 2nd appearance, 1st FF crossover (cool, but strange looking cover), 1st appearance of Chameleon (who?), 1st appearance of JJ Jameson (meh). I love both books, but will ALWAYS covet AF15 for the simple fact that it is Spidey's FIRST appearance EVER, with origin! Tech 27 had to wait until Tech 33 for Bat's origin. Hmmmm....another story.