OfficeMax offers the DiVOGA 20" Spinner Carry-On Suitcase in Red (pictured), model no. OM05671, or Champagne, model no. OM05670, for $24.99. Choose free in-store pickup to avoid the $7.95 shipping fee. That's $30 under the lowest total price we could find for a similar 20" spinner carry-on. It features a hard shell, retractable telescopic handle, and four 360-degree spinning wheels.
Update: Of note, the red model is available for in-store pickup only.