You have to work in comparisons. I mean, the 1984 corvette is a much better car than a 1982 corvette, even though the price is not that much different. You have to compare to other cars, how good it is for the times.
In other words, in 2002, a base corvette was comparable, in performance, to a Porsche Carrerra. Z06 to a 911. The same holds true today. By your rationale, a 1960s vette should have cost next to nothing, because of how great a new vette is. Yet, a high end, top of the live model cost 1/4 of the average house cost, for the time period. Because it was, for the day, a world beating supercar. Not too much out there that could hang with an L88 vette. But it only cost, what, 4-6 grand, or something like that? By your logic, it must have been a crap car....not the barely road legal, race ready, super car that could out do even most new sports cars of today, right?