Option A. Do nothing, which is what HMRC recommends.
Option B. Declare it on your self assessment, both revenue and expenses. The SA guidance will tell you not to do this as it is a waste of time since it is not taxable.
Option C. Take a variety of actions to disguise your trades so that they don’t get interfaced by EBay. These would be the same actions an unscrupulous trader would take to avoid paying tax, and might attract attention.
Option B. Declare it on your self assessment, both revenue and expenses. The SA guidance will tell you not to do this as it is a waste of time since it is not taxable.
Option C. Take a variety of actions to disguise your trades so that they don’t get interfaced by EBay. These would be the same actions an unscrupulous trader would take to avoid paying tax, and might attract attention.