From memory of most of the older design Dukes from that era had the same probs that they always had - crap electrics, poor finish, flimsy plastics.
The multistrada was a bit of a change in Dukes attitude to quality though. More modern design that shook off a few of the old problems. I know that SS models of that era still ate reg/recs and had a general aversion to water. A colleagues 900SL went through black boxes quicker than it wore out the tyres. The newer designed bikes had a far better reputation but still need regular maintenance as said above.
A mate was told by Massimo Tamburini himself that regular oil changes were the key to long engine life in Dukes. They don't stand neglect.
I'd be interested in it. But then I have an Italian bike in my garage already. It's worth the odd issue for the riding experience alone IMHO. You have a lot of fun for your money there if its been looked after.