I totally agree with Declan, as the gamertag is misspelt I would lower the price a little , good luck selling this gamertag, make sure to post proof or it will get closed , a rule is a rule.
You need proof. Microsoft is not going to ban a tag just because of a screenshot with the name on it. A screenshot is no way near enough proof for them to verify that you are the owner. On FK, however, it is.
PM me with proof or add it to the main post and I will re-open.