Hoydis has the method. You post, you take your time, you ignore the dozens of texts asking you to lower your price and
eventually it sells.
It's absolutely the place to get the best price, but it's kind of a hassle and you have to repost every few weeks or it gets buried. So take good pictures, but put them on a computer in a spot that makes it really easy to upload when you need to repost.
Give it a good description and fill in all the tags (such as #of cylinders, #doors, etc. Even if it's mundane. Many people, like myself, run filters for things like "V8 only" or "manual transmission", and even if your car has those things, if it's not listed....it won't get picked up.
That's why the description is important too, as you can filter from it too, stuff like "leather" and cut a lot of fluff out.