TechRise Direct via Amazon [amazon.com] has for Prime Members: TECKNET RGB 8000 DPI 6-Buttons Rechargeable Wireless Optical Gaming Mouse (Black) on sale for $15.99 - 31% off when you visit the promo code page to activate [amazon.com] (or apply code PHHDDBPO at checkout) = $11.03. Shipping is free.

TechRise Direct via Amazon [amazon.com] also has for Prime Members: TECKNET RGB 12800 DPI 8-Buttons Wired Optical Gaming Mouse (Black) on sale for $19.99 - 31% off when you visit the promo code page to activate [amazon.com] (or apply code PHHDDBPO at checkout) = $13.79. Shipping is free.

Note: Amazon promo codes don't always apply seamlessly. If you run into this issue, refresh the page, re-enter the code, or revisit the cart page.