eBags via eBay offers this Traveler's Choice Rome 20" Hardside Rolling Carry-On in several colors (Gray pictured) for $39.99 with free shipping. That's the lowest total price we could find by $6. It features a telescoping handle, tie-down straps, and internal pocket. It measures 21" x 15" x 9".
Nordstrom Rack offers the Cole Haan Pebble Leather Backpack in Black, Tan, or Chocolate for $97.43 plus $7.95 for shipping. That's the lowest price we could find by $63. It features an exterior pocket.