Destiny 2 purchased direct through Battle.net. Cheapest I've seen it, and I've not seen it advertised in the Black Friday store sales for EB, JB, HN or elsewhere.
Grab it from the website link above, or through the Battle.net launcher if you already have it installed for Blizzard games.
Destiny 2
Action Shooter
Save up to 35% on Destiny 2 – Limited Time Offer
Digital Deluxe Edition
$104.96 usually $139.95
Game + Expansion Pass Bundle
$97.46 usually $129.95
Standard Edition
$58.46 usually $89.95
Someone should probably post a deal for all of the Blizzard Black Friday deals found here: https://us.shop.battle.net/en-us/browse/blizzard-black-frida…