I saw a ton of Thief of Thieves #1s at C2E2, all priced at $10-15 each. They weren't selling.
ToT Comicspro variants for $75-100. They weren't selling either.
And Saga #1 RRPs priced between $150 and $200. They were still there Sunday at closing.
As you've been told repeatedly, single isolated sales don't make up a trend.
The regular ToT 1s have sold repeatedly on eBay in the $20-$35 range, so it's a trend there.
However, what you noted at C2E2 makes me wonder if the internet sales are inflated by hype, perhaps generated to an extent on this very board.
I don't think the ebay needs this board's help to inflate the price of a Kirkman property that has been optioned by AMC.
The prices may have been lower at C2E2, but that would just be a case of the real world lagging behind the internet hype machine. You get a bit out of touch when you're penned up in a convention center all weekend and, apparently, these days books can quadruple in price over the same period of time.
I bought 14 copies of ToT #1 at a random LCS on Friday - that doesn't mean it's still a $2.99 book.