Scotty just did a video about it.

A couple years ago one of my friends bought a brand new 2016 Toyota Tacoma TRD Off-Road through Costco and he saved about $2,000 that way.

You, do not really purchase a car through Costco. Your Costco membership gets you a good discount through a dealership. Basically, Costco is a auto brokerage service that works manufacturers and dealerships. 

Costco just connects you to a dealer they are not really negotiating the price for you.  I was going to buy a car through Costco and told the dealership Costco was going to give me some % in refund.  The dealership said they would beat it and give me more if I buy through them.  May be you can try haggling using costco refund to get more discount.  

Scotty read on average of 1000 dollars per purchase.

I have to say when I go to Costco there is a coupe cars outside for sale and they are amazing condition it is worth looking into;)

Posted by: @kerem

Scotty read on average of 1000 dollars per purchase.

I thought it was $1000 less than the asking price, on average? And that includes your trade in. 

I have seen good looking cars for sale in Cosco.  For $1,000 off that is worth looking at.

I’m curious if it is better to negotiate yourself, or just go through Costco. 

Yeah, I think it is more expensive, newer cars- definetly no cars under $15,000. My costco doesn't sell any cars, but I think your membership saves you $1000 on average so I would highly recomend costco.

Anyone have experience or knowledge of using Autolist and/or Costco to buy cars?  They each respectively (supposedly) pre-negotiate prices with dealers do you can walk right in with a pre determined no haggle price that allegedly saves you money. 

Does it actually save you money? Or is it better to negotiate? 

See below regarding Costco:

https://carkiller.com/scottykilmer/qa/cars-from-costco/#post-60046