I know that this is rather subjective question and I know that some folks will say it only matters how well the instrument plays or that 1978 is not really vintage but here is my hypothetical question. Say there was a pre 1980 instrument that is in fantastic shape with original case. It's not a Fender but it plays great. It's a fairly rare instrument that was made for Japanese market only and is very hard to find in North America in any condition. The bridge has been replaced with BadAss bridge that is better than the original but it is not original. I'm a little hesitant to close the deal because I really like all original instruments. Let's say I was prepared to pay $700 for this instrument if 100%complete. How much less is it worth? I know I may have a hard time selling it down the road but if I don't buy it I may never see another one and it is quite unusual.