It is listed at being $39.99 NEW.
So my statement that the latest Expansion of WoW costs $40 is true, and the "+" that I said next to it is because of the Collector's Edition
Which is listed at $79.99
So regardless, $10/$20 for TOR's 1st Expansion is a LOT less then that of WoW's latest Expansion. Given it could be because TOR's is Digital while WoW's had a Store Copy that one could buy from an actual Store, it is still a lot less.