There are some good deals on used Invest Arm guns showing up from time to time. Often the brand is labelled Safari Arms, or Churchill. These are usually better quality guns from the Invest Arm lineup, and go for much less than the Lyman stamped models. Lyman seems to draw higher prices for the lower quality models.?? name recognition I suppose. The TC line of sidelocks has been discontinued, but these are very good guns when you find one that is looked after. The TC prices are high now, but they don't seem to sell fast. Those priced sensibly go quick.
Pedersoli is almost always expensive, and of very nice quality. Good deals are still there if you watch for them. With any used guns get good photos of the bore.! some are pristine, and some are crap. I learned this the hard way. It did save me from buying a sweet 50 cal double Pedersoli that has what looks like hammer marks on 1 barrel end.
Pete