Ending today, Crocs takes 25% off sitewide during its Presidents' Day Sale. (Discounts apply in cart.) Shipping adds $4.99, or get free shipping on orders of $24.99 or more. A couple of best bets, with prices after discount and $4.99 for shipping:
REI Garage offers the Burton Kettle Backpack in Satellite for $23.73. Opt for in-store pickup to avoid the $5.99 shipping fee. That's the lowest price we could find by $7. Features include a padded laptop pocket, ergonomic shoulder straps, and external zippered pocket.