"Nice car"

I bought my 72 duster in Florida back in Feb. and stashed it at my in-laws till the snow melted up here and my wife and I drove it back to VT in 30 hours.
It was early morning, after a night of driving and we stopped to gas up in Penselvaynia, I go inside to get a coffee and pay and the ~25 year old cashier says to me

"nice car, is that a mustang?" I replied "no, its a plymouth duster"
"oh" he says, "what year?"
"1972" I say, to which he replies "oh, yeah, I thought so" ](*,)disgust