USAA has a "buying service" like many insurance companies and big-box retail outlets. Their Auto Circle has been around for a few years.
Now they've started a "Sell car" feature to let USAA members* list their cars for sale. This feature was added when USAA members asked for a way to trade in or sell their old cars along with buying new/used cars. The listings can only be seen by other USAA members* (and car dealers), but it's one more way to get your car on the market without having to worry about Craigslist spammers. It's also a great way to shop for a used car in your ZIP code. The "Sell car" feature includes reduced CarFax fees and, of course, USAA will be happy to sell the insurance.
* This time, "member" means anyone with a USAA login. You don't have to be a USAA property/casualty insurance customer with a military affiliation. You could be a USAA financial products or investments member as well.
I interviewed Steve Thompson, USAA's AVP of Consumer Lending, at this link:
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Author of the non-profit book written by military for military: The Military Guide to Financial Independence and Retirement-- now on sale at Impact Publications. For more info see my profile.