The other thing with the Solstice coupe in question, that really helps its price, is the rarity of one in GXP trim, particularly with the manual transmission. I love reading these studies, but it would really be interesting to look at these cars in a "market-neutral" way, by adjusting for factors like overall scarcity, livability, maintenance costs, etc. I think of all of them, the M3 and 911 are the best representation of purely coupe vs convertible, with really all else being equal.
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