How much was Welker charging at Botcon?
It was $200 but you could only get it if you paid for the Primus package ($409 for members/$509 for non) or upgraded to Gold package (an added $400 on top of the Primus) and you had to be a Transformer's Collectors' Club member.
Luckily, we don't have to deal with that at TFCon. Like many of the other shows he's done, it's probably going to be a simple package along the lines of what Cullen offered and charged last year (which is much more reasonably priced).
Fingers crossed they offer $75 add-on autographs like they did in Rhode Island.