Anyone have a crystal ball regarding the future value and/or collectability of these? 
Got any more info on this? Interested.If you can find and read the manuscript of the unpublished book of its development and production, it will blow your mind.
Assuming you're looking to buy one - What a seller saysA single year model, they only managed to sell 1500 of? 16" rear wheel you can't buy anything but Goldwing tires for? A 6000 mile valve clearance service interval requiring the engine to be pulled and 40 hours of book labor? Only maybe a dozen shops in the country with the proper tools and techs with the proper certification to work on them? Fairly common expensive crank and valve spring and other problems, no longer befing covered under warranty? No passenger accommodations?. A V4R is cheaper and faster and cheaper to maintain. Desmosedicis are going to plummet in value. I'll do you a favor and give you what a V4R goes for.
On a more serious note, if Bring A Trailer and Iconic Mototbike Auctions past sales are any indicator, prices for these seem to have bottomed in late 2019, early 2020 and have increased significantly from there (low to mid 40s to mid to high 50s now). Their collectibility is likely ascendant as they are an unique and significant bike in Ducati's history. Also MSRP for more recent Ducati special editions built off regular production platforms (ie.1299 Superleggera and V4 Superleggera) are significantly higher than the MSRP for the D16RR and although produced in smaller quantities these regular production based bikes are probably less collectible over the long run. Inflation in the price of Ducati's most exotic bikes will continue to drag D16RR prices upwards.Limited edition GP Replica of Casey Stoner's 2007 MotoGP championship (1st and only DUcati MotoGP championship to date) winning bike. Single year engine, frame, body, model. Liberally infused with carbon fiber, magnesium, aluminum and titanium. The first ever V4 Ducati motor. So exotic only maybe a dozen shops in the U.S. are qualified and outfitted to service it. Anything under original MSRP ($72,500) is a deal.
The "seller" is incorrect....Assuming you're looking to sell one - What a buyer says
Assuming you're looking to buy one - What a seller says
On a more serious note, if Bring A Trailer and Iconic Mototbike Auctions past sales are any indicator, prices for these seem to have bottomed in late 2019, early 2020 and have increased significantly from there (low to mid 40s to mid to high 50s now). Their collectibility is likely ascendant as they are an unique and significant bike in Ducati's history. Also MSRP for more recent Ducati special editions built off regular production platforms (ie.1299 Superleggera and V4 Superleggera) are significantly higher than the MSRP for the D16RR and although produced in smaller quantities these regular production based bikes are probably less collectible over the long run. Inflation in the price of Ducati's most exotic bikes will continue to drag D16RR prices upwards.
Just for what it's worth, each of mine do about 180hp at the rear wheel which would be correct (maybe even a little better) for what they're supposed to have at the crank.The first 600 had problems so if you are looking at one of those ask about recall work. I was told that it was found easier to drop the engine out for servicing. Also somewhere on this site is a statement by a Brit that said none of the ones that he had on the dyno ever came near the factory figure. Surely a nice 1299 Superleggera would be better. Cheers
ian