Best Buy offers Diablo III for Windows and Mac for $19.99. Opt for in-store pickup to avoid the $3.99 shipping fee. That's tied with our June mention and the lowest price we could find by $7.

Also available is Diablo III: Reaper of Souls Expansion Set for Windows for $19.99. Opt for in-store pickup to avoid the $3.99 shipping fee. That's $10 under our May mention and the lowest price we could find by $10.