Very nice. Similar condition to mine when I got it:
download/file.php?id=1032&mode=viewLots of penetrating oil, patience, and heat applied judiciously. If you plan to rebuild the engines, there are a few areas that are tricky - left hand threads, bearing carrier cover that needs to be knocked out from the far side, etc.
I found this book really helpful:
"DUCATI FACTORY WORKSHOP MANUAL: 160cc, 250cc & 350cc NARROW CASE, SINGLE CYLINDER, OHC MODELS". It is available on Amazon and eBay too.
The spare parts catalogs with exploded views and parts lists are on the Motoscrubs tech page.
Most of the parts were used across various models over many years, so pretty much all the parts are still floating around. You just gotta keep asking around, checking eBay, etc. They all show up eventually.
The date stamp on the forks (when you get the front wheels off) will probably shed some light on the year.
Welcome and good luck with them!
-Jim