Mono or twin tube? Gotta remember Bilstein makes consumer grade shocks too and it goes up in quality and price from there. Its been a few years since I got mine but they were around $500 for the rears, $1000 for the fronts plus custom struts, mounts, springs, revalving etc. All bolted on the car I guess it cost up around $2500. Even if it were just $1500 thats a fair bit of money to spend only to have to pull it off the car later.