It's been shown time and time again that 'down the road' a bone stock, no stories, UNTOUCHED ORIGINAL car (no matter what make the car may be) will be worth more than an 'equal quality' modded or FORMERLY modded car.
Although there will be those who'll argue this point, in the eyes of many people who look for a "no stories original", a car that has been modded at any time in its history will always be considered a 'modded' car and valued accordingly by them.
Anticipating the, "who's going to know if it was modded at one time", question - it's not that difficult to ascertain with just some basic sleuthing...like asking the 'local car crowd' what they know about the car. (E.g.: Some basic sleuthing revealed that a certain "red-on-red" '59 Impala I was looking to buy was actually "green-on-green" when delivered from the factory.)
Since you admit your car "probably won't be driven alot", and you "adore factory low mile originals", why pay for mods that will likely cost you again down the road? In your particular case, buying a 'stocker' would seem to be the best way to go all the way around IMO.
(Don't forget to have a PPI done by an expert before buying!)
Just my $.02. :cheers
(Incidentally, it might be interesting to ask the seller to state in writing that the car had never been modded, wrecked, blah, blah, blah. His reaction to that request may speak volumes! If he gets touchy or defensive that ought to tell you something. If, say, he's not the original owner and balks at giving you contact info for that individual - that too ought to tell you something. There are dozens of scenarios to consider, but, you probably get my point.)
