Duster vin # Help

Thanks for the responses guys for some great input. i am on the fence right now. I asked the owner if he had a registration and no answer yet.
How hard is it to get winshield and door windows? When they say a roller price how would a $1000.00 be a good offer?
thanks,
Bare with me im new to this..the last Duster I bought was brand new in 1970 Wish I could find that one.