I got my spoiler painted from ebay for $107 shipped. That's been three years ago and it's held up great. It looks like it came with the car from the factory. The only flaw is that the 3rd brake light on the spoiler isn't as bright as the OEM one. Be careful of buying one from China because of quality. Just read reviews from some of the users, make sure they're a good company.
I bought one off eBay a long time ago and installed it myself. It lasted about 5 years before the paint started to crack/chip. Also, the LED light went out after a few years. Not bad I guess for a $100 purchase.