Do your research. Set a budget. And if you feel comfortable in your mechanic ability then go test ride it. You'll know if something's wrong within the first few minutes of riding it and just the way it sounds.
Agreed. Jadidaskv I think you already know the answer you want from us, so better to just go for a test ride and check if the Blaster meets your expectations before you buy it
It seems like a fair price, from where I am across the internet having never seen the quad (so take that for what it's worth).
You should just count on there being SOMETHING that needs replacing on an old quad (maybe something big, hopefully something small), so don't go blow the other $400 on beer and pornography until you figure out what it is.