I am with newell38,
way too much work to reach a "questionable" level of personal transaction security. If you want to have additional security, then use the big auction site with paypal etc.
The main goal of TG is not as a selling platform, although this is a very "welcomed" part of it. Just let freedom prevail. It will give the moderators less hartache. If you get scammed, ignore it and delete it. How full is your spam folder every day anyways? So to erase a few more, who cares? If you want to swim in the ocean, you'll get wet. If you don't want to get wet, stay at the beach.