Walmart offers the Ameriwood SystemBuild 54" Wall Cabinet in White for $89.29. Opt for in-store pickup to drop that to $85.99. (Amazon charges the same.) That's $14 under our October mention and the lowest price we've seen. (It's the best deal now by $34.) It features three adjustable shelves and measures approximately 12" x 54" x 20".

Update: The price has dropped to $82.81 before in-cart discount, $79.75 after. Amazon is now a few bucks more.