look around and personally gas gas is great for me but not for everyone its not the make thats important its how you like the bike and i think you could do better than 03
but if you wana stick too gas gas and around 03 this is a georgus bike http://www.gumtree.com/p/cars-vans-motorbikes/trials-bike-gas-gas/104260967
when veiwing a bike check rear suspension linkage , listen for knocks ( clutch in , cover exhaust helps for knocks), look at condition (frame etc it will have marks look for dents etc ), make sure you are happy and will have fun on the bike
good luck
paul