<p>Have bought five cars with the Costco program. Got the lowest (internet) price we would have gotten eventually without a lot of haggling, plus bonus (once a $100 cash card, once free service for a year etc.)
It works especially well if you already have done your homework and have a specific make/model in mind.
Once you start the process you of course do not need to follow through, but we have always found the price to be just a bit better then the best we saw out there.
Basically it just makes it so easy, pick a car or two you want, call the program and they will set you up with their local dealer for that car who is mandated by Costco to give you a certain % over cost (or something like that.)
Disclaimer - hubby works for Costco, though since we did not disclose this that didn’t factor in to our dealings with the dealerships until after the deal was done.
Costco does monitor the program and if a dealer is at all shady or doesn’t follow the plan they are out.</p>