CPI 7x early 70s to now eh? I wudda guessed 4-5x. 60s being 5 to 6x.
I can recall as if just yesterday seeing a new 65-66 Mustang rag top, lite blue-green metallic, med blue vinyl interior w/ galloping Mustangs stamped onto the seat back, stick, spl chrome wheels (kinda looked like Cragar mags), being pushed into the showroom of my local Ford dealer, on my way home from grade school, AND the $2,600 window sticker. So 6-7x of say $3000, 21G? But a nice well equipped 2018 Mustang, not a spl limited prod factory hot rod one, don't they go for 35-40G, 10-12x of a '65? Guess w/ many things it's not an apples-apples thing. And I know an '18 Mustang is a much better all around car than a '65.
I pulled out my Tamiya 48th 1st release Lanc Dambuster/Grand Slam boxing. Prob released a yr after the original Lanc S-Sugar. Copyright molded on the spl bomb sprue says 1975. Box code has 3500 in blue. I'll take that as the Jpn Home Mkt 1975 Yen price. So 10-12 bucks. I bought new from a LHS (San Antonio Hobbies near San Jose Calif) in the mid/late 70s and it has a $37 price tag! Now I know middle men have to be paid and a profit made by the LHS, but still, 3x Home Mkt price?? Not a US Tamiya release tho. No English instruction sheet or such. Maybe the LHS imported direct. That would def add to his costs, esp if he had some airmailed ahead.
There have been cases here in the US recently that are close. Hasegawa US dist's pricing was nuts. 2-2.5x Jpn prices easy, if not more! Thank the model gawds for the www, eBay and esp big Jpn onlines like HLJ! The recent 48th Fine Mold Claude fighters show 3400 Yen on the box but are sold in the US for 'only' $50-ish. That's not too bad I guess. HLJ sells at a discounted 2800 Yen or so. And if ya get a credit card that doesn't charge foreign transaction fees (mine is Capital One and also has '1-2% money back on all purchases'), you save that otherwise 2-3% hit when you pay HLJ. Remember too that PayPal's hit to you is 3-4% when you pay HLJ!! It all adds up, sometimes quickly.
I think in 2018 there are some cases, Russia, PRC, Middle East, where the cost of a MBz, Porsche, BMW are 2-3X of Euro/USA pricing, for the same car! Greed, tariffs, lux tax, dealer support, port master's/political bribes, whatever.
AND, hows about that plain Jane SF Bay Area house bought in 1960 for 30G now selling for 1.5+ mil?!! What's that, 50x?!!! Supply-demand. Wacky.