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Marc S.There are about 500 complete or partial sets currently listed in PSA's set registry, including Sir Vorthian with his Fro-Joys.
From an amusing/where the industry is headed standpoint, there is a collector out there who owns a  completely graded  1974 Topps baseball set.
Over $5,000 in grading fees for a set that can be had for $500....not to mention premiums paid for high-grade examples.  With the large number of 1970s graded set collectors on the registry, I have a pretty good idea that this is the way thing may go  (at least in modern card circles)