I sold that same barrel one a year ago or so on Ebay for $180. You could offer it over on the encore contender for sale page or put it on gunbroker.com. Since you will get the 45 barrel on a frame, less hassle and no messing around with shipping to FFL dealers, I would first offer the 45 barrel here as a trade for whatever caliber you are looking for. The 45 is a sweet barrel. Thompson made them then discontinued them and I think is offering them again. Good luck.