Buying without negotiating
You can skip the haggle. Here's what that saves you, and what you may pay for it.
Plenty of people would rather pay a little more than spend a Saturday arguing. That is a legitimate position, and there are three ways to act on it.
Fixed-price retailers publish a number and do not move from it. The experience is calm and quick, and the price already includes the retailer's margin. You are trading whatever a negotiation might have won for the certainty that there was nothing to win.
Membership buying programmes pre-arrange pricing with participating dealers. You still visit the dealer and still pass through the finance office, which is where the products and the rate are sold, so the saving on the car can be undone afterwards if you are not paying attention.
Using a broker removes you from the room entirely. Someone else does the negotiating on your behalf and brings the result to you. In California a broker must be licensed and must have a written brokerage agreement for the transaction.
Whichever route, the same discipline applies at the end: ask for the out-the-door total in writing, read the itemised lines rather than the monthly payment, and decline anything you did not ask for. Avoiding a negotiation over price does not mean avoiding attention at signing.