Does anyone know a phone number for people that buy used cars?

I am talking about those people who say that they “buy used cars, or trucks, running or not.” I am looking to sell a 1981 Firebird, it needs some work in order to run well, but other wise, its good. I am looking to sell it for at least $3,000.

If you know of any number or person that buys old used cars, let me know!

Thanks.
I am selling, NOT buying.