A speed shop near me wants $220. I would suggest not buying online or through a private guy because if they do leak, you have no where to return them, and they mess up orders a lot. if you get them at a shop you can inspect them and return if you have problems. I wouldn't pay more the $235.
Well I got mine online at the APC website. I purchased them for $239.00 about 5 months ago. I installed them and haven't put any silicon on the seals and haven't had them leak yet. Maybe just luck. But that's my experience.