$1000 to around $1400 or so is probably a good bet for one of these. They aren't too common and most people that have em don't want to get rid of them, it's sort of a "either you love it, or you hate it" type guitar due to the color. But the maple neck...schaaaweeetnessh.
I think there's some serious mojo with the original UVs. I've current got a UVPWH from 91 and I used to have a 2000 777BK. The 91 has got it all over the newer model, the neck is better and the tone is just phaatt as all get out. Enjoy the GR, I think those guitars are awesome looking...but they look even better with a white pearloid pickguard instead of the black one.