[Trivial Psychic]

When I was collecting TWD figures, I actually found near the end that Walgreens was turning into my best source, being that hardly anyone was checking there, and the fact that many of the figures coming in were also exclusives. They were also releasing re-issues of older figures (Such as the Daryl/Michonne/RV Zombie re-releases that came out this past year.) so they were beating out Target and TRU.

As far as online sites, I honestly cannot recommend any other site than BBTS for new figures, as you can purchase them as a wave, and let them sit for a while so that you can build up a good pile of loot before having them shipped in order to save on shipping. Amazon can be good with newer releases, but be careful with Ebay, as a lot of people tend to think their MOC collections are worth hundreds of dollars.

If you're just getting into it now though, Ebay could be a good source if you run into someone selling loose. I recently dumped my TWD collection on Ebay for much less than what I paid for it (19 figures plus Daryl's motorcycle for a little over 110 dollars,) and many others are doing the same, so if you're willing to buy loose, you might actually come away with a good deal.