The high prices don't reflect the rarity of a car. High prices are driven by a fashion or a trend in particular models. The higher the demand, the higher the price. My car is extremely rare for example, probably rarer than any pre-57 model and no less scarse than a KDF but it will never command a particularly high price because there isn't an interest or a demand for this very specialised and obscure field of interest.
Another example: even though they are very scarse, I am sure it is far more difficult to sell a Rometsch Lawrence than it is to sell a Banana. Why? Because they are simply not as much in vogue or in demand as the other coachbuilt.
Splits and Ovals are getting more and more expensive because it's what everybody wants, not because they are rare. They are in fact getting easier to source nowadays than ever, thanks to the internet.:wink: