List the components or take a lot of close photos of them ( brakes, rims ), list any damages, scratches, something that might need fixing, basically do a good description. What comes with the bike ( S&S tool or other tools, spare tyre for example, whatever you are willing to include) Then come up with a price, which can be fixed or ONO. Also good to state location and whether you are willing to post it or wish to deal face to face.
State frame size ( google how to measure frame size ), even better if you look under the bottom bracket and find the first 4 digits of the frame number, thats the frame size on Thorn bikes. Something like 560S or 537L.
I might have left something out.
Some of this might be obvious to you, just trying to help!
