Best Buy offers the Logitech G502 Proteus Core Tunable Gaming Mouse, model no. 910-004074, bundled with two $20 Steam Wallet Gift Cards for $79.99 with free shipping. (The gift cards will be added to your cart automatically.) Assuming you'll use the gift cards, that's $15 below our mention from two weeks ago and the lowest total price we could find by $21. The mouse features five DPI settings, adjustable weight, center of balance and placement of weights, and 11 programmable buttons.