High milers

Hi everyone. i have just read a thread where one of the members has covered 179000 miles.

It makes me think....our P Reg mav has covered 126000, My X reg mondeo has done 149000 miles. my old 1998 escort covered 295000 miles before it failed an mot for rust. and the car we had before the mav...a Sierra did 190000 miles.
My point being that when looking for a second hand car to buy (about 5 years old), the mileage in nearly all the adverts rarely seems to be over 89000 miles for what ever age car you look at. Is 89k a magical Number???? it seems to me that low milers are advertised as so, and the rest cover 89000 miles. has anyone else noticed this.... dasboard re-calibration...Hmmmmmmmm!
i am not lucky enough to be in a position to buy new cars. the way i see it why pay £18000 for a car when i can get one 5 years old for £3000 do 200000 more miles in it then throw it away.