It's not for the one 20 minutes for the person who buys the machine,
silly, it's for the X number of 20 minutes they spend showing it to
however many people look before someone buys one. And if they knew you
were not going to buy from them, I bet they wouldn't want to spend the
time trying to sell the machine by demonstrating it.

Charlie wrote:
Indeed, but not £200 for 20 mins.

The reason the store sells them for more is because they take the time
to demonstrate it for you.

--
I know God will not give me anything I can't handle.
I just wish that He didn't trust me so much. - Mother Teresa