You can change your registered e-mail address and other account information at any time. Just go to the "My Account" menu item and click the ‘Edit’ tab. After changing the required information don’t forget to click on the ‘Save’ button at the foot of the page.
Your e-mail address is never displayed unless you put it in your item description (which we advise against). It is only sent to other registered users on the SkateXchange system to aid in contact regarding listed items.