I've been buying, selling and trading guns since I was a teenager (many years ago LOL) including a number of years as an FFL............. Have gotten a lot of great deals and a few not so good ones. Some stand out more than others. At OGCA a couple years ago I had set up my table and went for a walk. Old guy had an N frame S&W on his table for $400, looked it over, was a WWI British contract piece, still in 455. Considering the prices I usually see on those I happily paid him and turned to leave only to have him stop me and give me three boxes of ammo that went with it! That was a very nice deal.
Still find deals, usually at the shows but sometimes in shops. Picked up a very nice Winchester model 67 at a local shop for $150 OTD a couple months ago, good gun for the grandkids. Was set up with a friend at a show in southern Ohio earlier this month. One of the other vendors had a clean Savage 1917 in 380, after looking it over I ended up getting it for $300 and found it had two factory magazines with it! Haven't seen one this nice for anywhere near that price in a long time and factory mags aren't cheap either.
Deals are out there and I'm always looking.......... Though sometimes I buy something just because I want it, deal or not LOL!