New here! Does what ever stop? I don't feel it's anyone business what firearms I own, so FFL is really not what I want. To me FFL is still another form of registration. But I feel a buyer needs something to have in case his firearm is stolen and he can some kinda proof of ownership if needed.
Most (including myself) feel the same about a BOS. The best way is to have it checked during the purchase if you feel it necessary. There are and have been a lot of guns I would have bought but that BOS requirement shut it down from my side.