Walmart offers the Oster 0.9-Cubic Foot Microwave Oven in White, model no. OGM490, for $49. Opt for store pickup to avoid the $4.97 shipping charge. (You can also pad your order over $50 to qualify for free shipping.) That's $22 under the lowest total price we could find for a similar microwave elsewhere. It features 10 adjustable power levels, child-safe lock-out feature, and express defrost.