Think so
Absolutely.
They do trade in many kinds of collectables, and these would likely be something they would be interested in, but they are more interested in super-rare items. For example, say you were selling Pokémon cards, unless you had a valuable card (think mint condition, first printing of Charzard), they would likely suggest you piece out the collection and sell it on eBay yourself for the best money. Otherwise, they will make an offer on the entire collection, rather than buying it piece by piece.
They have a vintage unboxed action figure collection. Just call them and ask if they're interested in what you have
Seem like a thing they might do.
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