I think I have a problem:
Passed on these for sooooo long. Which sucks now because I have held wave one in my hands numerous times year or two back when they first came out. Anyway finally caved on the Walgreens Rick a few months back. Then wanted Maggie, but found Glenn first. Then got Maggie. Then bought comic Governor. Then remembered the sports card shop by me had some WD stuff so stopped there and bought Tyreese, wave 3 Michonne and wave 2 Shane all for $13.95 a piece which is an awesome deal for Michonne and Shane. Then stopped into TRU with my 15% coupon and bought the lone Daryl/Merle 2 pack they had. And had to buy a Bicycle Girl off ebay. Good God. My wife is going to kill me.
So what's the problem? You definitely snagged great deals for Michonne and Shane. As long as you don't go full-on completist this line won't be too painful on the wallet. Most of the 2013 figures are relatively cheap, and McFarlane's trend seems to be releasing 3 waves per year which is pretty light. The early figures, exclusives, and variants are where the line gets pricey.
Oh, shameless plug: if you want some cheap Wave 4 figures ($10 a pop) let me know. I have some extras I want gone.