Only my opinion, but since these cars are hard to find now, (in good condition), I believe if the car is in good condition, just buy it. More important is the choice of what you chose to spend on it after you get it.
If you are like me, as long as you have a good starting point, you can make it whatever you want out of it. So original investment will no be as big of a factor, as long as YOU end up with what YOU want at the end. These cars are very cool, demand attention and can change peoples opinions (lifelong Ford guy before this). My only regret is waiting to long to get a V, and joining this forum.