$875 too high?

go look at it -- if this is a daily driver car-- then the price is not out of line, check the rust & see how the car runs / drive the car-- 9" brakes & all ----15 minutes- you'll have you idea of worth-- judging by the ad-- the car is priced correctly-- don't worry about the seller-- just make a fair offer & move on.
This depends on what your friend is wanting.
Good Luck !! Lawrence