Rice, to get an idea, you may want to go to some of the auction sites (GB, GA, etc) to see what the going price is. Remember to check SELLING prices of past auctions, not asking prices.

I think that the value really depends on actual condition and originality of parts. If you post some pics, some of the experts here (not me) may be able to give you a good opinion. In my opinion, if it ALL original and a Service Grade , $800 may be a bit low. If its a Rack Grade, $800 may be right - if its original.