A FFL has spent the time working with you on the transfer particulars. Then they have to enter each firearm in and out of their records. They have to communicate with the receiving FFL to obtain a copy of their FFL license before shipment can be made. Appropriate law enforcement databases are checked to ensure the firearm was not stolen.
Shipping entails obtaining the proper size shipping box, weighing the package, determine its dimensions, prepping the package with cushioning material, preparing a packing slip and supporting documents, sealing the box, entering shipping information in the courier company’s shipping system to generate a shipping label, affix the label, contact the courier to arrange pickup and tender the package to the pickup employee. Many FFLs do not charge a handling fee to perform this work, they just collect the actual shipping costs charged by the courier.
Do you really expect a FFL to perform all of the above work at no cost to you, or at a minimal fee that does not recover at least their actual labor costs? A five dollar transfer fee, or even a twenty dollar fee may not recoup the employee labor costs to assist you with your shipment.
Do they operate a business simply to provide a free convenience to you? Would you consider offering your own business services for free or at a reduced price that doesn’t cover your cost? The initial question certainly presents a perspective that shows an incomplete understanding of a balanced retail relationship between the customer and a vendor.