Well, you asked non-FFL holders to look here, so I've got a stupid question.
How much is the DROS fee? Or more specifically, how much can an FFL charge? What additional things does he add in there and just call fees? My local gun shops all charge different amounts. And I'm not talking about transfers. For the guns they sell in their shop they each charge differing amounts.
ETA: Well part of my answer is here
. But that says $25. One of my local shops charges $35 and another charges $45. Again, this is for guns that they stock and sell.