Local show all makes and models great car beside me.

[Carolina_Mountain_Mustangs]

There was a show today local and I drove the 1973 vert there. It sprinkled a little rain going but not much so just a wipe down when there. The car beside me was also a 1973 AMC Gremlin X 401 and was done pretty close to stock. I do not know how the engine should be but was not over done. He retired from Ford worked at the Cleveland engine plant in maintenance. Had the Levi Interior with the tags. Aluminum door panels and the rear looked really well built. He said he hardly takes out and will probably sell it. What should I offer?