9mm SMG Ammunition Hirtenberger L7A1, 550rds

I have 550rds of 1991 Hirtenberger L7A1 9mm ammunition. This is SMG ammunition. The only exception would possibly be the CZ-52. This ammunition was produced between 1990 and 1992. Many samples exceed the NATO maximum chamber pressure specification for small arms, which is 50,000 PSI (345 MPa). In terms of the commercial availability of these rounds, the MOD released 12 million rounds of L7A1 ammunition as surplus. Since the ammunition is packaged in a 1,200 round case, this means that 10,000 cases were released. Since HP refuses to sell this ammunition to the public, and only produced L7A1 in 1990, 1991, and 1992, and only for the British contract, that means that the entire world's supply consists of 10,000 cases. Likewise, within several months of release, BATF banned the importation of the ammunition, due to its being unsafe for use in handguns. This second fact makes the ammunition even more rare in the United States. To compound that fact, much of the limited supply in the US has been shot--this 550 is the remainder of one of the 10,000 cases produced. This includes 3 sealed boxes of 50, 3 opened boxes of 50, and 250 loose rounds, all which was stored in an ammo tin. Asking for $400OBO, and prefer local pickup, but shipping is possible, but expect shipping cost to be around $50. Will consider trades towards firearms, such as a Glock 20, or a Keltec CMR.