[l_eclipse_l]

Wrong subforum. Unless you are selling or looking to buy something, you don't post here.

You may want to PM a mod to move the thread to Performance/Problem Diagnosis, I think either would work in this situation.

As to your question, the answer is it depends. Valves are relatively inexpensive from what I have seen, the expensive part is installation. If you can do it yourself (I'm guessing probably not) then it will only cost you parts, otherwise to have someone do it for you is where it will hurt your wallet and will vary depending on who you have do it. Call around to some shops in your area and get a few quotes.