It's called Oddities and Curiosities, I'm being silly. They travel all around the US major cities annually. Last year, they were auctioning off a rotting canine head complete with flies in a small pet container. So weirdo-convention does still seem appropriate for what is there.

Don't worry i know weirdo convention wasn't it's real name XD i meant it seemed different because i didn't know there was a convention that specialises in selling bones and skulls and other things like that but i agree weirdo-convention is certinately one way to describe it XD