I would put it on every free web site i can, there is AFORS but also UKGA and of course flyer has its own esales. The hard bit will be knowing how much to ask, so have a good look through other ads of similar aircraft if you can, remember that engine hours and equipment will make a big difference, I would allow about £8-10 per hour for engine hours difference, if you do not have 8.33 spacing on the radio and mode S transponder then most buyers will want to allow for upgrading these.