This is how I did it....takes time but simple.
I have been a FFL/SOT since 1986 out of my home until June 2008 when I opened GunRunnersUSA.com.
Your initial FFL application will cost 200.00 to cover your background, after that you pay 90.00 every 3 years.
As noted above your SOT either C2 or C3 dealer will run 500.00 per year. I decided to stick with C3 dealer just because of the ITAR issue. I can not make any post 86 mg's but can get them with a demo letter from a LE agency, but I have no worries about the ITAR...letters for me are not a problem.
A dealer had a 10/22, m4 and thompson in NH...I bought all 3 just to get dibbs on the 10/22...and it works. John Norrell made a few posties back in the day but he doesn't do that any more. I had about 1k in each of them.
Then a couple of years later a C2 died out in ID. He was a history buff, had a mg 34. bren, Grease gun, russian dp, tommy, vickers, 1919, MP-40, PPsh-41, BAR, Sten, swedish K..I wanted the BAR in the worst way but someone else beat me to it...I ended up buying the rest of the collection on one demo letter.
ATFE is NOT the big bad wolf everyone claims they are...I have heard horror stories but I have NEVER had an issue with them. You must know the rules and play by the rules.
Since the C2 died and he was the only one on the FFL/SOT ATF could have taken the post 86 guns. They let the dealer's Aunt dispose of the firerarms but the only catch was they were tax paid firearms (form 4). I had never seen a post 86 gun transferred on a form 4 until this deal.
Long story short...I bought them all except the BAR, paid 200.00 transfer tax for each one to get them to TN along with the cost of the guns...much cheaper than pre 86 guns. Since that time ATFE has allowed the transfer of post 86 guns no letter required if the C2 or C3 is going out of business.
In reality I can not "keep" any of them, but I pay 500.00 per year to be a C3 dealer so in a weird way I am "renting" them until I retire one day...until then I have PLENTY of post 86 guns to do demo's with and have a little fun in my off time.
I sell about 50+ NFA items a year so this more than covers my SOT.
JP in 10-E-C
www.gunrunnersusa.com