Further mitunnelrat's thread about his knife, let's display our best knives here. I'll start.

I picked up this one on line. The guy sold it to me $5 and even shipped it from AZ to FL. I am so in love with this knife. It looks like it has seen some diving time and it is still in perfect condition.

USN MK3 MOD 0 Navy Dive Knife w/scabbard