I have one of these 15-125's. I got mine off of ebay a while back. I think I paid $40. I haven't used it yet, as it needs more internal cleaning of gobs of oil dried oil, etc.
I had heard that these are good sturdy machines, and I am planning on using it for heavier projects like sewing drop cloths, tarps, and maybe some leather.
Hope you get this one, or find one that will bring you many years of use!