I thought about this the other evening when we were out returning a few mispurchased/defective gifts. Here's the bet: You give me $75 and go away for awhile and then come back. If you win, you get $77, if you lose, you get nothing. The odds of you winning get smaller the longer you stay away. If you come back in 5 minutes, you're probably 99.9% certain to win, but stay away for a couple of hours and the odds drop quickly.
This is essentially the wager (restated a little weirdly) that you make when you park at a meter and don't pay. I started wondering: how big would the fine have to be before you wouldn't park for five minutes without paying? This probably varies from person to person. What's your number?