Okay. You've kicked yourself in the teeth here.

a) Your account is really quite worthless with it only being a "Member" and the fact that it has negative feedback, as well as default trust feedback.

b) Prepare for further negative feedback as sold accounts are generally used for scamming. I have sold accounts myself, but generally making some sort of effort to make sure it won't be used for scamming goes a long way. For example, leaving it neutral feedback to say you sold it, which you can't as your only account it appears is this one. Another way would be to sell it to someone that you know will be using it for legitimate purposes. Put short, please try and make sure you're not selling it to an a*****e.