RE: demil
The ocean dumping project hasn't been done since the mid- to late-1990s.
There are a few pieces getting out, but not through DRMO, and not very many. Forget about M1 Abrams and M2/M3 Bradleys, they will never be released. You might get lucky and find a M48 series tank, or a M113 APC. The older stuff, from the 1950s on back, is fairly common and easy to find. If you want modern armor, your best bet (if you have the cash) is to find an importer of armor, and buy from them. They can't bring in any USA-made stuff, but stuff from other countries is fine. Lots of Combloc stuff from Eastern Europe and former USSR is coming in nowadays for relatively cheap prices. In the UK, anyone with the money can buy operational tanks, own them and drive them on the street. (no cannon ammo, sorry) For the best in heavy armor, there are a bunch of British Centurion and Chieftain tanks that have been sold as of late. Recently, a TX dealer was selling a few Chieftains for $45,000 each, for a 45-ton main battle tank, 1960s vintage. Now that is pretty good!
Good luck finding your armor.