Where can I find 70's usa cars in Houston?

Hello there, I'm searching for usa cars from the 1970's. I can not find them on Google/Yahoo etc. Can someone give me some webpages from used car dealers who sell these 70's cars? Or an ad page where normal people (I mean no dealers) advertise there old cars? Please send me an email if you got an adress in Houston. I'm planning to buy cars in Houston with my uncle and have them shipped to Amsterdam in the Netherlands (europe)