Yeah, it's pretty crazy what some of the POP!s go for, especially the Freddy Funko versions. There are also some very well known artists in the collector's community who customize their own and sell for crazy money. I've seen some go for hundreds of dollars. Never thousands like that Boba Fett Freddy though. That's INSANE!!!
I picked up the Wizard World exclusive (top left), unfortunately it was not signed. However, I have seen the autographed ones go for under $100. I have plans on attending both SDCC and Houston ComicPalooza next year, both of which he attends. Pending the old man doesn't kick the bucket by then, I'll be getting his John Hancock myself.