eXpansys offers the Belkin 6-Outlet Clamp-On Surge Protector, model no. BZ106000-06, for $15.99. With free shipping, that’s the lowest total price we could find (outside of the price below) by $4. It clamps on to a desk or table leg and features 885 Joules absorption, 6-foot cord, sliding safety covers, and more.
A close price: Geeks sells it for $9.99 plus $6.43 shipping.