There are lots of different ways to abuse a motorcycle, lack of maintenance or beating on the bikes engine etc can be just as bad as each other. My stunt bike is in better condition then a lot of peoples street bikes I see on the road today, it gets wheelied and dropped all the time but I fix everything that needs fixing. So you shouldn't judge that bikes condition based on how I ride it alone...Some people have mint looking bikes that look brand new, but they never change the oil or fluids in it till something breaks. So Ive seen it both ways bikes ridden hard and beat on but taken care of so are in good operating condition, then good looking bikes that are rarely even ridden and have had little to no maintenance and run or ride like crap.
You have to look at everything, the bike, what kind of riding it was used for, who rode it, who worked on it, what maintenance or repairs were done in its life time...