Look for alignement , look for oil leak at the base and tyre,
listen to the sinuisoidal rhythm of the engine ( piston going to
jam if sound abnormal), check the electronic circuits like ERP,
check the exterior , check the tyre balding.... check how many
owners from the website,
More imptly, ride the bike yourself. If you ride alot of them , you
will tell the good ones from those in bad condition. Best to bring
a biker friend along
