My Mum brought me up to believe that if you look after the pennies then the pounds look after themselves, and I could never do it.
I always feel a bit trapped when a painting goes for millions of pounds and only one person can have it. If you can have that as well as a poster on every student's wall, then you're in a very enviable position. I'd like to do a Damien Hirst for £500 at some point.