As someone who just sold his 69 Vette roadster, not all cars are appreciating madly, for some reason, C3 Vettes are the best deals unless you’re looking for a 427, then you pay. Small blocks are a dime a dozen. Bought it in 2001 for 14k sold it for 22k, not bad but I got it cheap so thats why the price difference.
This doesn’t surprise me. With Vettes, it’s always been about the primo engines.