REI offers the Timbuk2 Large Bike Seat Pack
in four colors (Black pictured) for $11.83
. Choose free in-store pickup
to dodge the $5.99 shipping fee. That's $9 under the lowest total shipped price we could find. Sales tax is added where applicable. This ballistic nylon pack features rubberized piping, a Velcro strap to attach to bike seat, interior keyring tether, and more.