Amazon offers Prime members the Mr. Coffee Automatic Milk Frother in Stainless Steel, model no. BVMC-MFC200, for $48.40 with free shipping. (Non-members can spend $49 to bag free shipping; otherwise, it adds $8.20.) That's $32 off list and the lowest price we could find, outside of the mention below. It can create up to 8 oz. of cappuccino froth or 12 oz. of hot latte milk.

A close price: Target offers it in Black, model no. BVMC-MF100, for $49.99 with free shipping.