Well.. for starters you if you wanted to sell your account on Ebay they would need it to access everything; have control of the account, if not the price will drop 1/2 of the value.. That extra 500$ is for the SW if you have a good account for sale..
http://cgi.ebay.com/World-of-Warcraft-A ... dZViewItem
For example, this guy is really cheap, but does have the SW if he didn't it would sell for about 250USD
Here is an example that doesn't have an SW, and if you notice he bought the account for 600$ and is selling for 600$, and hes no longer a memeber.. I personally think this is scam but thats just my brain
http://cgi.ebay.com/WOW-account-epic-Ro ... dZViewItem
Just remember your SW for later on if you quit you can sell all of your phat account for big $$ :]
TIPS FOR REMEMBERING YOUR SW
1. Pick a name of your favorite pets name
or pick it as your mothers maiden name.
2. Write it down, just down make it a .txt file on your comp and save it "my wow account" thats how your accounts get stolen, write it down IRL safe, where only you know where it is, or a Password safe on your computer..
Hope maybe this helped some other people with their SW.