Might be worth the asking price if lined and the missing holster were available. Its mostly only cowboy action shooters usually SASS shooters who use those buscadero style rigs. Standard belt and holster rigs are much more comfortable and practical.
I could see myself paying $100 for a gun belt, I’ve paid close to it before, but there’s no way I’d pay $100 for an old gun belt lol. It may very well be worth it as an antique, but to me it’s just an old gun belt