+ 1 for Fleabay, I've sold a few bikes on it including a GSXR750Y (why oh why did I sell it????), an NC700X and Yamaha MT03 in recent years. I've also bought nearly of my bikes from ebay listings from £500 bangers to my one year Africa Twin last year and zero hassle as buyer or seller. Plenty of good pics, word the advert sensibly, be honest, ask a reasonable price, respond promptly to questions and you should be ok. Of course usual caveats on cash buyers, meeting places, etc but you can usually tell from the proposed buyer whether they sound ok or not.
Good luck!