DeTomaso Pantera GT5-S and a spare ZF-5 transmission.
Just because it wouldn't depreciate.
The best way to spend $70,000 would have been Ford Motor Company stock. You can't drive it, but if you dropped $70k on their stock 2 weeks ago, you would have $117,000 today. Being that they're the only ones not receiving taxpayer money to stay afloat, you'll probably see 3-4x that gain within a few years and your money would be fairly safe. IMO of course.