Anything's possible. The market could tank and gun sales plumet because the fear of future regulation goes away. The price could spike because all the sudden people realize the old S&W's are just as good if not better than the new ones being produced. I wouldn't trust anyone who professed to "know" where the market will be one year much less five years from now.

It sounds like the guns your looking at are some of he most common models so the good thing is they aren't really too overpriced for their utility. Any decent quality steel revolver costs $400 or more. If your paying $600or so for a model 19 I can't see the price dropping to much. It's never going to get any cheaper for manufacturers to make them.

I'd be more concerned about not overpaying today vs future unknown value.