reminds me of the story about this chap at the airport who stops someone carrying two heavy suitcases (no wheeled cases in those days) who had just got off a flight from Singapore. The chap stops, pulls back his shirt cuff and says 'It's 1pm here in the UK, 8am in Singapore and oh - it's about to start raining'.
First bloke says 'wow, that's amazing, you get all that from your watch?'
'yes' says the second 'and it does more - it's got an alarm, a timer and a calculator - saw it in Singapore and thought 'I've got to have one of those'
'I wouldn't mind getting one of those myself'
'well you can buy this one off me if you like, I'm back there next week and can get another'
'it's a deal, how much?'
'$500'
So the first bloke hands over the cash, takes the watch, admires it, put's it on his wrist and starts to walk off
'wait' says the second bloke. indicating the suitcases - 'don't forget the batteries'