Noticed this daily deal from Mighty Ape for $9.99 on Splinter Cell Blacklist for Wii U. Even with the $4.99 shipping it's still cheaper than I've seen elsewhere.
There were a number of other Wii U daily deals also at http://m.mightyape.com.au/daily-deals/slot/16190 - none of them stood out to me, but if you're already paying for shipping then it's not too bad.
http://www.mightyape.com.au/daily-deals/slot/16190
if your not on the mobile.. :)