Hello
if you want to show your account , you can choose the vidéo , and you can use Team Viewer
:
you can talk with your customer about the price etc with another programm like Gmail , Facebook or MSN
so team viewer is a programm which show your customer your display , but like a video and he can do some actions like clicking , but if you see that he"s buying ou selling anything you can close the programm
sorry for my english ^^