There are many independent fulfillment services. It is doubtful if you will get pricing info from them as it is a competitive business. Some are are more expensive than the big boys, some are less. Price is not the only criteria in the mix, turn-around, quality, making the vendor look good, customer service, ability to adapt on the run, communication availability, quick correction for mistakes and possibly many other small matters that make a warmer more comfortable relationship between customer, vendor and supplier.
It is like trying to compare the experience buying a lawnmower from Walmart and expecting quick serves on repair and purchasing from a small business that services what it sells and to whom your business is important.
It is like trying to compare the experience buying a lawnmower from Walmart and expecting quick serves on repair and purchasing from a small business that services what it sells and to whom your business is important.