AltaTac via eBay offers the HP Wireless 2.4GHz Optical Scroll Mouse in Gold (pictured), model no. LX460AA, for $14.99 with free shipping. That's the lowest total price we could find by a buck. This 4-button mouse features a 1750 dpi optical sensor and4 EN/FR languages. The included nano receiver allows for this mouse to be used with up to five HP-compatible devices at a time. Offer ends September 22.

AltaTac via eBay also offers the HP Wireless Laser 5-Button Comfort Mouse in Dark Gray, model no. LB423AA, for $14.99 with free shipping. (Action Gear via Amazon has it for the same price.) That's the lowest total price we could find by $10. It features a 1,200 dpi, LED battery indicator, 2.4GHz wireless frequency, and Link-5 compatibility.