Errrrrrr ......forget what I just wrote....tis a load of tosh.
I've just looked at fleabay for the Fazer600 and there is virtually nothing there second hand, but I can see why it's a difficult choice cos there are a lot of new ones at around the price you are looking for.
Blimey, I wish they had that many when I had my fazer600...I got a scorpion from Birmingham MC show. It was ok but nothing special. Better and lighter than the standard, but now there seems loads of choices....again, good luck!