My A prefix Model 39-2 is 1976 (bought new).
$325 is low for my area but the initials scratched in the frame if visible detracts from the condition so may be a fair price. Personally, I'd try to leverage that into an even better deal. The alloy frames last fine but I don't know of any good way to refinish wear or damage.
Many think Model 39s are the most comfortable grip of any 9mm.