Banksy - are you out there?

Money-spinner ... I Can't Believe You Morons Buy This Shit by Banksy

I don't know much about art. My girlfriend, who holds an art-related degree, considers the Banksy picture which hangs in my office to be conclusive proof of this. It's called Heavy Weaponry and five years ago I paid £100 for it. She thought it was an outrageous sum that confirmed, if confirmation were needed given the picture itself, that I was a philistine. When we moved house she tried to get me to throw it away; I refused and neither of us thought any more about it.

Until I overheard a work colleague talking about Banksy and how much his pictures were fetching after an auction at Sotheby's catalysed the market. "Quite a bit," I was told. In April, Space Girl and Bird sold for £288,000, the highest figure ever paid for a Banksy piece. There's no way Heavy Weaponry is worth that much - for a start it's much smaller - but, even so, it seems I now own a valuable piece of art.

I haven't decided what to do with it yet - most probably have it valued and insured. After the initial thrill of the windfall faded, I found myself thinking less about the money and more about how my relationship with the picture had changed. Like that with a neglected relative who I recently discovered was rich, perhaps? Actually, no. I think I liked it a little bit more when it wasn't significantly different to the Duran Duran posters I had on my wall when I was 10. Now it could be the deposit for a house, for some reason, I like it a little bit less.

Banksy's relationship to his art appears to be similarly ambivalent. On the second day of the Sotheby's sale, he updated his website with an image of an auction house and the message, I Can't Believe You Morons Buy This Shit. Now, I may be a moron, but it seems to me that he too likes his art a little bit less now it's worth a fortune. Maybe he doesn't even think it's art ...

But rather than speculate, I'd like to know for sure. This blog will be a record of my attempt to interview Banksy. He's famously media shy, so there's a good chance I will fail. But maybe the process will be revealing, a tangential comment on Banksy's art in the same way that Banksy's art - terrorists throwing flowers , policemen kissing , children digging a hole through the West Bank barrier - offers a tangential comment on the world. Or maybe it won't and it isn't.

Banksy: are you listening?