I've seen used Johnson scrolls in the 1800-2200 range. There was one a ways back for 1500 over at TB, iirc. New they're quite a bit more (not sure exactly - 3-4k?). The old Ampeg AEBs with mystery pickups seem to be falling in the 2-3k range. This might go on the higher end of that, since the AMBs don't turn up much, use normal length strings, and have a magnetic pickup.