Matt thats an arse, the single reason I hate selling cars/bikes/vans is people like him. Thats how I usually tend to hang on to things way longer than I should because I simply just cant be arsed with time wasters.

Best thing to do is assume everyone is wasting your time, no cash means no test ride, couple of revs is ok but start wringing its neck like your on the start line of the Moto GP and Id have gave him a slap. I find being really blunt with people a good method because the genuine folks will stick it out if they are really interested and the time wasters quickly get bored of it and fuck off.