Stoner's 2007 Championship Ducati GP7 just sold at the recent Silverstone auction for £402,500 ($530.7K)!
Capirossi's '03 GP3 from Ducati's first year in MotoGP went for £201,250 ($265.4K)
https://www.motorcyclenews.com/news/2024/august/ducati-motogp-race-bikes-sell-casey-stoner-loris-capirossi/