Target cuts up to 29% off a selection of men's, women's, & kids' backpacks, with prices starting from $12. (Prices are as marked.) Shipping starts at around $6 or get free shipping on orders of $50 or more. A couple of best bets:
Nordstrom offers the Marc by Marc Jacobs Large Domo Arigato Crossbody Bag in Fluoro Coral for $98.98 with free shipping. That's the lowest total price we could find for any color by $18. This nylon bag features a leather trim, top zip closure, interior slip pockets, exterior zip pocket, and an adjustable shoulder strap.
Stage Stores offers the Sofia Bellina Cherry Blossom Duffle Bag in Black or Ivory for $14.99. Coupon code "30247" cuts it to $10.49. With $6.95 for shipping, that's $20 off list and the best price we could find. It measures 19" x 11" x 5" and features zip-around closure.