It fits a 12" subwoofer, I believe the actual cutout size is 11.25" or something like that. The reasons I'm selling it are because the subwoofer itself turned out to be total junk, it doesn't really fit anywhere in my house, and I'm going off to college in a few months anyways (no way I'm hauling this with me).
I really don't know exactly how much this is worth, but I'm going to say $200, because of the materials and amount of work that went in to making it.
I will
definitely not ship this, as costs would be a nightmare (this mofo is heavy, solid .75" thick oak), so pickup only. PM me if interested.