The same way I did. A high interest credit card that I paid off without ever paying the 19% or whatever they had it at. It could have been 300,000% for all I cared, I paid it off before I was charged a dime of interest.
Paying bills on time. Buying gas with the credit card. Paying for car repairs with the credit card. Having an apartment that someone co-signed for, and paying that on time. A car payment is not required, and from what I was told when I was buying my house (a far better investment than a fast-depreciating car) it was good that I didn't have a car loan, because that reduces the amount I can borrow for a house by increasing my current debt.
No warranty? What illustrious warranty do YOU give your cars? 30 days? 90 days? A year? How much do you stand behind your second-hand cars that you know nothing of except that you screwed over the person you got it from, to turn around and screw over the new owner of it? Or do you mean the factory warranty, that would exist whether you sold them the car, or the previous owner?
More importantly, how much less than it's value do you give the previous owner, and how much more than that do you sell it to the next owner for? <--- That $$$$ amount is how much you are overcharging over what a private party would sell it for.
It's like going into a pawn shop. You're looking for a PS2. Guy walks in with a PS2. Store offers him $15 for it. Guy is desparate, and takes it. You then buy the PS2 from the store for $60. Store made $45 because you 2 didn't find each other earlier. Had you, you could have had it for less, and he could have gotten more.
All you are is a middleman, Skillionaire. His best deal would be found directly with a private party. ESPECIALLY before he has good credit. Come on, you know it's the truth.
If I had $250 and looking for a starter car, I'd be PMing 0HP930 about his car.