Batman #400 CG 8.0 s/s Adam West, Val Kilmer, Neal Adams, Bernie Wrightson, Steve Leialoha, Bill Sienkiewicz, George Perez, Brian Bolland & Burt Ward - $695
Structurally, it's 9.8, but some fingerprints on the back cover is what brings this down.
Also, it should be noted that there is NO personalization on this book from Adam West, which is about as scarce as hens teeth
Again, not so much the book but the signatures---with both non-personalized West plus Kilmer (two actors from Batman lore on the same book)