Looks like you got a possible WINNER
there. Parts on Mv's can be hard to get and can take a long time to order from Europe (by you or your dealer as I understand) !
My Duc's:
888
998
And yes, the 1098 series is suppose to be a LOT less maintance intensive. How much, I don't know. But you can go to your BMW/DUC dealer over on Meridian and ask. The 999 was suppose to address the short valve checks and other things, and now the 1098 series is suppose to be better. But, Desmo Valves (no springs) still need to be adjusted. And until someone can figure out a way to have them adjust themselves, a direct cam to valve arrangement needs adjustments on ware. Remember these were orginally used because you can't have valve float issues. Then, it became a Duc legacy along with LOUD DRY CLUTCHES
But, if your a Duc kinda Guy, then nothing else will satisfy you. But again on your Mv, if I had other bikes to ride, I would check the maintance records (along with WHO did the work -- I doubt the owner did - get it's history (where bought and who has owned it), and if it looks good then BUY
You'll have something Beautiful, Italian and when your at a stop light and look over and see another bike and rider just like YOU, THEN YOUR LOOKING at a MIRROR
The feeling is NOTHING like you've ever experienced, sorta like driving a Ferrari, nothing else matters