When I was a teenager, Dad did a lot of car work on the family cars. He also bought a few. He never let me help on repairs or go along when he bought a new one. I received an old car he purchased as a birthday gift when I was 20. I drove it to college and had no idea how to maintain a car. After a couple years. it died. The mechanic showed me that the oil was like tar.
Well who knew you had to change that? Dad never mentioned it. So I walked miles and rode buses for year because I was DEAD BROKE and living on Hamburger Helper.
I didn't ASK for help, but Dad took SOME pity on me and bought another old car. It lasted 3 years. My BIL replaced the engine from another old car but that lasted only 6 months. After that, I never mentioned problems.
Not knowing anything about negotiating car prices, I paid sticker price for a used Chevy Vega Hatchback. The car has a terrible history, but I actually got a good one. After it died, I asked a friend to drive me around to several local dealerships to find a new one. I didn't want a used car.
Now, my friend was an experienced negotiator. Did contract negotiations. Had bought several cars (and explained later that he had worked the price down). We finally landed at a Chevy dealer and I asked to see the cheapest car on the lot. I said "OK" to a Chevy Scooter at full price. I didn't know you could negotiate. My experienced friend did not so much as whisper a suggestion in my ear.
And a knowledgeable friend would do that, right? He didn't. He just let me go on being a real sucker. I only understood what a sucker I was later. HE said "Well, it was up to you". Some friend... I think it made him feel "superior". Well, we had some other things in common like fishing and games. But I finally dropped him like rock in 2011 and am greatly relieved for having done so.
The next time I needed a car, I researched. I found Consumer Reports car pricing site. Loved it. But that is all detailed in the previous 2 posts.
I've learned to negotiate and rather strongly. I've learned that "best offers" are never the best. I will survive without the CR pricing data. I've learned to never offer the fair price, because salesmen just consider that a starting point to increase. I probably won't get as good a price as I used to, but probably will pay well less than average.
You do what you can with the information you have...