Temig240 + tax is about 260, so only an 8 dollar discount for this drop. I could save 3% (252/260 is .969 ish) by buying into this drop, or I could help out the LGS... I love massdrop for card sleeve and other swaggy MTG drops, especially for products my LGS doesn't carry like ultimate guard deck boxes. However, the drops for sealed MTG product rarely offer a significant saving for California residents.
TL;DR: Pros: save 8 dollars, 3% savings, Cons: wait 2 weeks, don't support LGS, 3% savings