As one of its daily deals, Amazon offers the Razer Diamondback Chroma 7-Button Ambidextrous Gaming Mouse, model no. RZ01-01420100-R3U1, for $37.99 with free shipping. That's tied with our Black Friday mention and the lowest total price we could find by $30. It features seven programmable buttons, a 16,000 dpi sensor, and customizable lighting. Deal ends today.