For those who are interested buying WhatsMiner M3 from Pangolinminer, they have announced that there will be discount coupons for the Black Friday.

Hello my friend,

We will release coupons for BLACK FRIDAY today!

Source: https://bitcointalk.org/index.php?topic=2447221.0

The only official shop is at their website www.pangolinminer.com

edit: They posted the discount coupon code for Black Friday sales:

venderdinoir!x

is the coupon code

30 USD discount for each unit

Valid until November 30. Contacted them earlier today.

FYI the $30 off is for EACH item in cart so it can add up