dbcooper’s spot on, I’m not remotely angry, although I do roll my eyes at threads like this, particularly when they’re from parasites folk who are more active on the classifieds than the forum.
You sought advice. Your bike is worth what someone will pay for it. Someone may pay £300. You have not yet found that person. It’s been 2 week days. Leave it a week, give it another go, post it again (as I said, you can’t bump classified ads). If you want a quick sale, try dropping the price. Include photos, I’m not gonna bother to email you, I want photos of the item, not “it’s like this” photos, even less so when it isn’t really “like this”, as it’s a different colour.
All that said, IMO this is not the best place to sell stuff, I much prefer eBay these days. Yes there are fees, but your market is vastly bigger, and you don’t get beaten up on price for a few pennies.