Mostly depends on what you want and if there are any other "hidden" costs, like shocks, struts, alignment, tires, rims, etc. also is it a direct bolt? You don't say if yours is a the same year, model so I have to say that.
Shoot him a low price.... you can always up the $$$ but never back down. Worst he can do is say "Oh no I can't do that.
Just my $.02...... Tux...