I bought an AEA MM3 back in the late 80s and loved it. It got stolen back in the early 90s while I was overseas in the Gulf War. Getting back into Amateur Radio in 2016 I acquired a MFJ Grandmaster memory keyer. It was an ok keyer but somewhat complicated to load the memory. I was looking for anther keyer for contesting. One of my very good friends that pasted away (Bob, WR4FSU SK) his wife Helen, who is a ham, was selling some of his things at the Orlando Hamfest. She had just a couple things left. I asked what I could buy. She said what was left of value was a AEA MM3 . I could not be happier and I could not say I wanted it any faster. . Number one the MM3 is, in my opinion, an excellent, versatile, multi use, and yes a vintage keyer. Number two, it's also my favorite because it use to belong to a very good friend.
For paddles I have Brown Bros. BTL, Kent, Vibroplex delux paddles, Autronic, and few others. Currently I'm using Brown Bros. paddles.
Nice topic , Chris ko4dn