TigerDirect via eBay offers the Logitech Couch M515 Cordless Mouse, model no. 910-001840, for $14.99 with free shipping. That's the lowest total price we could find by $10, although we saw it for $3 less two weeks ago. This 2.4GHz wireless mouse is designed for use on couches, carpet, blankets, desks, and more.