Other tricks I see on a regular basis are having the steering wheel turned so you can't see the mileage of the dash or even hiding warning lights, having the belt covering the wear on the drivers bolster or even leaving it out of the photo so you can't see half the foam hanging out.

If these are present on a car add I'll usually just not bother enquiring.

I once went to look at an a4 in Birmingham that was advertised at having 100k miles, and obviously good condition, upon viewing the car it had been used as a pool car by a small company, so been ragged about and had a dump valve fitted on a TDI, interior was really rough as well as engine bay, the dash odometer had failed and the previous MOT's had mileage recordings of 190k miles on it, to say I was annoyed was an understatement, he even said the mileage over the phone, his excuse was "it drives like it's done 100k miles" needless to say I walked from that one.