Vlves are a 5-6 hr job depending on who you talk to. find out the shops hourly rate, multiply it by the recomended hours and thats your starting price. So what if it takes 'em 2 hrs to do a job that is supposed to take 5, you're gonna pay for it one way or another. No need to punish somebody for being good at what they do. Just as a refrence, i just spent $500 to get my valves done. Yeah it sucks ass, but it was done right and i've got no complaints what so ever.