i think ebay gets a wider audience, its a lot easier to find specifics than auto trader is, but tbh you get loads of morons, ive managed to sell 1 car on ebay out of maybe 5, with loads of timewasters and tbh at the cost id say go for autotrader

pistonheads seems a much better alternative to both though, get a lot of people looking at it, and with it being free its worth a try

weve just found our new car on pistonheads, picking it up saturday