Is this more of a museum of items from the show or an actual store where you can buy antiques and collectibles?

It's a souvenir shop for the show. Few antiques for sale.

It's both a store and collectibles

There are antiques in the store for purchase such as Evil Kenevil's jacket and others, and show souvenirs are sold here.

Not too many actual antiques but it's cool to see

I was just there last week. Not a whole lot to purchase there. It's mostly a souvenir store. There are old antiques there, but most are not for sale. They are mostly some of the big finds they have gotten over the years and not for sale( NFS). And the store is very small. The majority of the marathon building is a museum and other vendors that sell stuff out of it. Was still neat to visit and check it out. Highly unlikely you'll ever see anyone famous there.

Several souvenirs, they do have collectables but very high priced ones

Both they have plenty of collectables.

It both alot of suffs