Altogether on American Amazon, as of 1017 EST on 10/11/17 (all prices USD):
We Didn't Playtest This at All + Chaos Pack (Base): $12:30
We Didn't Playtest This Either: $11:58
We Didn't Playtest This: Legacies: $12.29
We Didn't Playtest This Pasted on Theme: $10.50
Grand Total: $46.67, two day shipping with Prime.
MD includes all listed and charged me $5.90 for shipping, bringing my total at the drop points to $50.89 and $44.39 respectively. The estimated ship date is 3 weeks after the drop ends, and then the items have to get shipped from Edison, NJ. Transit time for me on the eastern seaboard is about 4 days. Estimated transit time for west coast fam is probably closer to 10 total days, middle America call it an even week.
Do with this knowledge what you will.