Hi and welcome.
Is it just the bridge or does it come with a headstock piece similar to the Erlewine Lazer(sic) guitar? It's obviously a bridge+tuner mechanism, so unless someone is looking to replace one that's gone faulty on a Lazer or Hondo. it really needs to be paired with a suitable headstock string clamp device (or a double ball-end string holder) for someone making a headless guitar. Both the current Lazer II and the old Hondos seem to be selling at (or at least priced at) reasonably high figures, but it's a case of the whole being worth a lot more than the sum of the parts.
Buyers would be rare, and as they are still making the Lazer, I assume that Erlewine guitars could still supply a replacement bridge if one ever went faulty.
Unless you picked it up for free, then you'd certainly want to recoup any money you spent on it. You could always price it on the high side but be open to offers. It would probably be more interesting to a pro or semi-pro luthier who wants to make a headless guitar and knows of a suitable headstock piece.
So I'd price it at something around a lower-end original Floyd Rose bridge, say $200, but be prepared to take a lot less if it didn't sell. A luthier type forum with a sales page would probably be the best place to gain interest for it, but I'd first try and find some matching 'headstockless' hardware to suggest that it could be paired with.