OK, we have narrowed it down to the end.
First off they are NOT that uncommon although they are not made anymore.
Remember: Those that look new (like the one in your example) and have a correct Buck box and papers will sell high. Those that are scratched, sharpened a little, dirty, no box will sell for less. You can get one of those and with a little elbow grease make a nice everyday carry knife. These are long slim blades, not for prying gaskets or hose clamps
(your racing avatar name). They come in two versions, they look the same except the base of the main blade is stamped different. The one in your example is the newer version, the older ones say BUCK, Made In U.S.A. with the model number 311 stamped on the other side. If you check out sales, pawns and online you will find a decent carry knife for $35. Good Luck
300Bucks