i apologize for answering half a year later, i've been busy with work. I bought it from carid.com it was about 270 bucks.. the installation was pretty easy and the paint matches pretty well ! i was very anal with them on the phone about the matching of the paint and i had many complaints about the time they took for them to ship it to me to hawaii . . but the price was worth the wait because, yes in fact the dealer wants too much for it ... i hope this info is still useful for you !
Where did you buy your spoiler? The dealerships want over $500. I was looking at a JKS factory style sport spoiler for less than half that delivered...