At Seattle in 07 they had 10 issues of the Spider-Man ones up for silent auction. The silent auction was actually a piece of paper and you just wrote your offer on it. So I offered $150 for the Darick Robertson one and the dude after me writes in $151.
Nice to see they've changed up their ways, not to mention ebay will get them the most $$$. A stupid sign up sheet is just lame.