I don't know about that, well at least for the CSVT's. There are three on Trader right now and although one is in fact overpriced I applaud the fact that people are starting to ask for better money for these increasingly rare cars. Enough people run them in to the ground or kids wrap them around trees without much thought and that spells good things for good owners in the future. I baby my car, maintain it like a Breitling. This spring it'll get a clutch even though the old one isn't quite spent, a quaife, brake job, cooling system flush, a $500 complete exterior detail, complete stainless exhaust with all MSDS up front.
I don't expect to ever recoup the costs of maintenance or subtle performance enhancements, I plan to keep the car forever. I really should start having it appraised every other year and share that information with my ins. co.
I'm paying $117 a month currently and I still think that is somewhat unfair considering I put 10K or less a year on my car, it's a pleasure vehicle. And God knows if I went to battle with the insurance co. if something happened they'd be dips. The book value is ridiculous on our cars. When I bought mine three years ago the one broker I spoke to about a quote replied "You paid how much?"... "But the book value is almost half of that". EEEEKKK!!!!! But I got a pristine, unmolested CSVT with 113K for a good market price at the time.
So who cares, those people who realize the increasing rarity of their car should enjoy that a bit and treat their cars with a fraction more respect. I know many of you do here but there are many that are just beaten upon and laid to rest. Truly a shame.