Over $20 ($20.37 with tax) with shipping; Amazon has them for (CORRECTION: $20.66) with Prime.
Also depends on how tax is charged for different locations.
justinmrkvaPrime costs $7 a month.
Order 4 things that's $1.75 shipping charge for each.
So $20.75 on Amazon.
Wait time not included.
MassDrop doesn't charge us for getting group buys. Just saying.
BlueCrownedGood point, although we both forgot to include tax (on my Prime price and on your MD price).
I've corrected the original comment, the difference is actually very small with tax. The main difference is shipping speed.
BrainFlushPeople always say "...with Prime" when complaining about prices, but I only purchase on Amazon ~3-4 times a year and often the items are less than the Prime monthly fee even with shipping... so I don't have Prime.
justinmrkvaRe: your edit, there's two states in the US that charge sales tax for MD because the office is in CA and the warehouse is in NJ so if you're outside those two states the tax is irrelevant. International notwithstanding of course.
Also depends on how tax is charged for different locations.