If you go to the following URL without logging in (or your cookie expired), it just says, " 's Albums for Sale." It's missing the username.
http://vgmdb.net/db/marketplace.php?do=saleview
This URL appears when you are editing your sale list.
When you are in the Marketplace and click on a username of somebody selling something, the URL changes to
http://vgmdb.net/db/marketplace.php?do=saleview&userid=[USERID]
That probably means that when you are editing your own sale list, the user ID is being stored in a cookie, so all you need is
Code:
http://vgmdb.net/db/marketplace.php?do=saleview
, but the page ends up behave badly if the cookie is not there.