I have bought and sold MANY in the last 15 years, but there are two that really stick out. One was a 1969 Belgium Browning High Power that I sold to buy a Sig P228 in 1995, and the other was the first pre 89 Colt AR-15 that I ever bought (I have owned 15 since). I bought it for $600 at a gun show in 1998 and sold it for $1500 just before Y2K. One of the best profits that I have ever turned gun trading, but I wish I had the gun back.