I was on the Net yesterday and ended up reading a story in the online edition of an Australian newspaper. It said a couple of Australian states had sold a pile of 2.5 inch M66s (possibly back to the manufacturer) instead of destroying them as other states had done.
That could mean a bunch of short, used M66s on the U.S. market sometime in the near future. I own a 2.5 inch M66-5 and have found it to be a fine gun. They haven't been that easy to find, so this might be a good/last? chance to pick one up.
Looking forward to seeing them listed in an ad somewhere soon.