var yuipath = 'clientscript/yui';
var yuicombopath = '';
var remoteyui = false;
else // Load Rest of YUI remotely (where possible)
var yuipath = 'http://yui.yahooapis.com/2.9.0/build';
var yuicombopath = 'http://yui.yahooapis.com/combo';
var remoteyui = true;
It is probably legit but don't ever trust emails from eBay or Paypal because 99% of those are scams trying to steal your money or passwords.
That looks like the monthly invoice ebay usually sends but don't trust it anyway. Instead just go to the ebay site then login and click on "my ebay" then on the left hand side you will see "seller account". Click on that and that will show your invoice for the month which is probably $6.34 which you should be able to pay with paypal or a credit card.