I got one of those limited edition Ducs, 1 of 450 bikes.
Turns out it was 1 of 450 in North America, 1000 of them made World Wide.
And they made 1000 of them every year for 3 years. Then they had a special edition Troy Bayliss edition, which was another 500 units, bringing the total up to 3,500...
And then I had the gall to actually ride the bike, putting on over ~20,000 kms in the 3 years I owned it. Lost 2/3rds of its value because no one wants a "collectible" that's been ridden...
Real collectibles aren't created by artificially limiting supply. They're created because the factory doesn't think they'll sell well, so they limit production accordingly and the model unexpectedly takes off well after the fact. Examples of this are the Ducati SportClassic which sell now more than what they cost brand new.
It's a bit like comic-book collecting. Rare comics are collectibles because no one back then thought they'd be worth anything. Now, they make 10s of 1000s of #1 issues of new comic book titles and they're basically worthless.
No modern limited production homologation (not special edition Matrix/Bayliss/etc) Ducati "R" bike after the 996R currently sells for more than its MSRP. It's just not a thing anymore.