Is there any fulfillment store inside the USA that would just distribute the items? I see a lot of fulfillment store that stores your item and ship it out after each sale. I want to see if I can ship the bulk of items from China to the USA every few days and they would just ship out individual packages to each buyer using USPS. I have thousands of items so it won't be possible for me to store in a fulfillment store atm. Any feedback is highly appreciated.