We are in Oregon which is a "blue" state thanks to the People's Republic of Portland. However, it has an extremely strong hunting/gun tradition. Maybe we have problems because we sell so many firearms. We have been in the same location for over 30 years and are the preferred shop in our area. Or it may be that you don't want to know of problems and assume there are none.
As far as state laws go, we can sell a long gun to individuals who come into the shop from ANY state in the union EXCEPT Kalefornia. WE must ship ANY non-antique gun to an FFL dealer in that state then he does the transfer. HOWEVER, we cannot ship ANY gun to that FFL dealer UNTIL we have contacted some odious state board which gives us a number that allows us to ship a gun into Kalefornia. Also, many guns are illegal there which are perfectly legal elsewhere. This is all before the new, even more odious gun laws which will be voted on in the Kal state houses in the near future.
Pete