Larry, what is there to say, the FWB 65 is the most honored single gun in the history of the sport, period! If you find one, just buy it, you won't be sorry.
If I could own only one air rifle, I'd do some waffling over what it would be...but if I could own only one air pistol, I would pick an FWB 65 without the slightest hesitation. It has it all: incredible accuracy, fantastic trigger, great sights, easy to cock, relatively high power, astonishing durability, fine handling. My only complaint is that they are rather heavy, but that's the name of the game with most springer match pistols.
Jim E often has 65's for sale, they do turn up on the classifieds, etc., and they are common as flies on German sale/auction sites if you want to go that direction.
The FWB 80 is generally similar to the 65. It came out in the late 1970's, has a revised trigger mechanism, a more square-cut trigger guard, and an interesting system of screw-on balance weights beneath the barrel.
I have two 65's that are different ages and vary in quite a few details, I'll try to take a few shots of them in the next few days.