My other thought is that GT is one of a very, very small handful of nameplates out there still defying gravity. There is no other way to frame the results for various McLarens other than brutal. I think the big drop in P1 prices is probably related to exorbitant costs of ownership due to battery replacement, but I could be wrong. Sennas selling at less than MSRP is proof that the market values beautiful over fast.
The 675LT Spider with 217 miles at Gooding hammered at $205,000! Assuming the car is reliable, that is the performance car deal of the century. That is an absolute animal of a car to drive/ I would imagine that Spider carried an MSRP well north of $400,000. Undriven for $205,000? Yowza.
F12 TdF got a high bid of $670k, was routinely north of $1 million. 458 Aperta only got to $450k. Pretty much every 70th Anniversary Ferrari I saw flopped out, which wasn't a huge surprise.