I've bought and sold at least half a dozen of those Ninja's little brother.
Made good profit each time.
Only the carb version, always cheap to purchased used.
Very easy to work on and get it running nicely.
Their engine is tuned nicely to operate at high rpm, and smaller engine displacement make them unattractive to thieves.
Plenty of cheap parts for them in salvage yard or online sources.
Insurance for each of them cost me $35 per year.
I used to ride them in the street of Brooklyn, Manhattan, etc.. and never had a worry to get the bike damaged, stolen.
The small, narrow profile of the bike made it perfect for going between car mirrors.