PistonHeads Classifieds
Pistonheads are worth a shot, a friends lad put his fairly new Mustang on there thinking he would struggle for a buyer & he had foreigners falling over themselves to buy it, he was sensible with the price at about 10K & it went within a week. Ad only cost him £9 too
You can always buy a cheap Sportster for 2 or 3 grand to keep you on a Harley