Opinion on rollback...(the verb)

[wetsuff]

I've found a pretty great car....reeeeasonably priced, but the Carfax shows what - could be explained away as - prior Km readings vs. the mileage readings of odometer at the dealer. (..can't imagine a leasing co., or lessor, being that dumb tho'..)

They're going to have to sell it 'mileage unknown'. I buy on 'condition' and will keep it for a decade ...and difference is only 30k vs 15k anyway...

Question tho': how easy it is to "roll-the-tumblers"? (digital one's anyway...)

Jim