Welcome!
Looks very nice. Off the top of my head I'd say it is an LS450:
http://www.matsumoku.org/cm_models/2021 ... ii-review/ http://www.matsumoku.org/cm_models/2021 ... rd-copies/I know there are some differences in the logos and the knobs but I think they're just due to being different years. (The one you're looking at may be a '76 and the first one I linked to is probably a '78)
We know the pickups are not original and it looks like the tuners and tail may also be replacements.
I'd be interested in it depending on how much they're asking for it.