The standalone version of Uncharted 3 still sold well:
http://www.amazon.com/gp/bestsellers/2012/videogames/ref=zg_bs_tab_t_bsar#1
It's #28 on Amazon's top sellers of 2012. Gears of War 3 is #70 in comparison.
Bundles are undeniably a big part of the sells but it's not like the game isn't selling on its own. It really proves that Uncharted 3 probably is a big incentive to buy a PS3. In my opinion it's actually the best game Sony could bundle with the PS3 right now.







