Utilize your financial knowledge, give your answer or opinion to the input question or subject . Answer format is not limited.

Are car buying services worth it?
I went through the Costco program for the so-called "no-hassle" bargain price when I bought my Prius. According to other Prius owners that I've met on forums and TrueCar's web site, I paid "average." Lots of people in my area managed to negotiate a better price by $1-2k. So much for getting a deal. I do not plan to use Costco to buy another vehicle again.