I have avoided paying a parking ticket of £3 before because the fine is £50, and rarely (but sometimes) enforced. Assuming I get caught less than 1 in 17 times, it is a logical thing not to pay. I would say I get a ticket roughly 1 in every 40 times. which works out at about £1.25 per stay. Have you parked without paying because you know the occasional fine will be cheaper in the long run?