You have of store credit. To use it, simply place your order and you will be able to choose store credit as the payment method when it comes time to pay for your order.
Spyderco Sprint Runs
Serveral times per year, Spyderco manufacutures a limited number of knives not found in their regular product line. They call these batches Sprint Runs. The runs are limited in number, usually less than 1500 pieces and will not be reordered or available again once sold out.