Bought a SMLE Mk.III at the Muncie gun show back in the early 90's for $60.
Used to buy California police turn in K-frames in Arizona gun shops in the mid 90's for $150 each, virtually unfired.
Had a lady give me an old bench rest high power rifle, mauser action, chambered to 30-06 for free. Took it to a gun show and a guy bought the action alone for $100.
Traded an LC9 with all paperwork and box, an extra mag and 50 rounds of 9 for a California DOJ S&W 3913 made in 2006 with 3 mags in excellent condition.
I guess for the 22 craze picked up a HP22 with box and papers. and a little over 4k in ammo most in ammo can the rest mini mags and stingersfor 160.