Yeah, I've been watching for another F5, and am surprised what they're going for in the used market. I got a almost mint one around 3 years ago for $800 with the leader out mod. I also got a 85mm f1.4 and a 28mm f/1.4 used for $1400 around the same time. Now that used 28mm alone is going for $1800+ on auction sites!
I did get my nikon stuff from PJs going canon, so I agree w/ George that they've all made their switchesi. Also, the D2x brought Nikon up to speed in the digital market , so I imagine there are less people selling their Nikon gear to move to Canon and more people buying gear up.
It was great while it lasted!