Loads of bike about with big mileage there was a honda cb500 courier bike with 360,000 on it on ebay a while back. and there is a guy on bcf with a rxs100 with around 500,000 miles on it
I knew a courier who found that the shop where he purchased his Honda 750 refused to offer him anything in part ex and tried to persuade him to sell it in another city after taking their stickers off it. He had had it dealer serviced every week for a year and it had gone around the clock which read a convincing 12,000 miles (112,000 miles actual). It looked immaculate with no stone chips, rust or scuffs but would very likely have soon become a money pit needing extensive engine work.