Over on TCGplayer, the lowest shipped listings are sitting at $69.96, so Walmart technically has the edge (even if only by a single cent)
Will ship in a penny sleeve and top loader protector sleeve
People like to buy boxes to crack lots of packs, have higher chances of finding that special rare or mythic they need, or play Limited
If you just want to stomp the game I think things are easiest with Squirtle and friends by far, since you can build it into a Rain Dance deck later and have something that's out of any of the CPU trainers' league, whereas Charizard and Venusaur aren't as competitively powerful(though Pokemon Center cheese with Venusaur is pretty entertaining...), but you can really get away with doing a decent version of whatever you feel like running so I'd just go with whatever you think sounds fun
Abrupt Decay is the newest Golgari card to have fully established its place in the cube
This card destroys all Spells and Traps on the opponents side of the field