Throwing in another data point here: I also loosely follow the used Porsche GT3 market, and there's a clean, low-mileage, manual transmission 2018 GT3 that's been for sale for almost a year now:
Jan 2023: $250,000 CAD
Mar 2023: $240,000 CAD
May 2023: $233,000 CAD
Nov 2023: $210,000 CAD...