K B Online Enterprise will unconditionally guarantee any GMX system for a 90 day money back guarantee to the original purchaser minus shipping costs. If the product you ordered does not work as advertised you can contact us and we will give you instructions on how to return your product for a prompt refund. Most items will be shipped within 7 to 10 business days. Large orders, custom items and special orders may take longer. If your package is damaged in shipping, please contact the carrier ( UPS, FedEx ) and file a claim using the package tracking number. All claims must be filed with the carrier. Shipping costs are calculated by the weight of the package, not the individual units. Shipping rates are listed below. 

Customers that order a G M X  model # 400 will receive free shipping.

Orders shipped via UPS ground is 3% of the product total, or $18.00, whichever is greater.

((((FedEx Orders are temporarily not available at this time.))))

Orders shipped via FedEx - 2day service is 4% of the product total, or $24.00, whichever is greater.

** Sales tax within Califorina only is 8.75%