Give Gumtree a go, up to 10 pictures now (used to be 4), and free. Sold my boat on there last April, it was gone in a couple of weeks. Be prepared for the bogus overseas buyer who sends you a text message asking you to communicate via email outside of Gumtree though. Probably works on an oil rig or is buying for a relative and will offer to buy site unseen and they say they will organise their own pickup on consignment. You can do one of two things, tell them to nick off, or string them along for a bit of fun.
Cheers, Marschy