Demand for graffiti art continues to rise as investors and collectors see potential for strong future returns. Banksy might be the most famous, but Ben Slow, Bambi, Robin Rhode and Plastic Jesus are other artists to look out for. The image shows street art by Ben Slow off London's Brick Lane.

Have you got a fortune sitting on your shelf? Discover 25 old DVDs worth a lot more than you think

Liked this? Click the Like button above. And click the Follow button above for more great stories from loveMONEY

Updated by Alice Cattley

20 surprisingly valuable things you might find lying around your home