Amazon has the Lowepro Fastpack BP 250 Backpack for DSLR, 15" Laptop, More (LP36869) for $75 with free shipping. List price: $130. Includes enhanced protection with a built-in all weather cover and cradlefit device compartment, plus three primary storage zones. Has excellent Amazon Reviews.
B&H Photo Video sells it for the same price.
eBay has the Samsonite Pivot 3-Piece Luggage Set (several colors, 103173XXXX) for $200 with free shipping. List price: $680. Features strong, lightweight 100% polycarbonate material, slide, glider, push, and pull with spinner wheels. Set includes 20", 25" and 29" pieces.