RCA RMW741 0.7CF Countertop Microwave (Stainless Steel) for $49.00.  Select free site-to-store for in-store pickup at Walmart to save on shipping.  Otherwise, shipping is $4.97 for a total of $53.97 shipped.  Here is a screenshot for your reference.  It features 10 power levels, cook-by-weight, and measures 19.5"W x 15"D x 11.5"H.