Used water cooling system?

Does any one know of any web site that sell used parts and water cooling systems

the classifides here has them, once you get 3 stars (100 posts) you can view them and sell/purchase things. Check out the cooling section when you get access, theres always plenty of water cooling stuff there. Also, check out other sites such as hardforum, amdmb, procooling, etc etc. Forum classifides are your best bet really...or ebay. Other than that, i dunno if there is any mainstream site that I would trust.