2. You can checkout and pay immediately after the auction ends or you complete the purchases. If you need an eBay invoice sent to you by Email, please contact us before making payments. 3.Once the checkout is completed, you will not be able to include any additional purchases. We start to process and fulfill your order once payment is received. New purchases after the checkout will be processed separately. They are estimated average delivery guidelines but not guaranteed UNLESS otherwise specified. Please understand that USPS (US Postal Services) First Class Mail service is typically 3 - 5 business days to most locations in the continental US states, while Alaska, Hawaii, APO/FPO/DPO and US Protectorates may take much longer time, and the delivery time may be affected from time to ti.