It all depends on maintainence and who owned it previously and how much they took care of it
I would put the 60,000km mark on a bike around the 200,000km point on a car.
I believe he is around 250,000 Miles now. (His Car also has 650,000 Miles on it)
With proper maintenance, this is about right.
Those airport cabs typically do not retire until 500,000 -600,000 kms.
People sell cars because they have trouble at higher kms, because they don't realize stuff needs to be replaced, but the vehicle can actually have a long life assuming it hasn't corroded away.
People consider mileage historically, but modern bikes with water cooling, EFI and synthetic oils, modern alloys last a really long time if not abused.
The money is not in the engines, but typically the chassis bearings, forks, shocks, and electricals. The new concern is all the computer units and ABS on modern bikes -these are notorious on even $20,000 exotic bikes. Both Nissin and Bosch have had recalls.
Having said all that.. most GTA bikes are abused, and there is a lot of junk on Kijiji even below 50,000kms.