IMO but I guess it is totally up to what you want in the end. Do you want just a nice driver if so probably buy it. If you are wanting a purpose built car, it may be better to build it or have it built (depends on your talent, desire, and free time if you want to do it yourself). In my case I had an idea of what I wanted to start with so I inevitably just purchased a gutted shell and am starting there, I didnt see the need to cut up a good car to start, but starting with a good car has its positives also. It all boils down to what you want (reads how much money you have) that will dictate the path one takes. I think I totally talked around your answer like a good politician but i think you get the jist of what I am saying...