But for those who play AM and want the best of the best echo, power mic, noise cancelling, and talkback mic, the 2018 mic is by far the best IMO.
Even if you do not use the other features, the power mic portion itself stands head and shoulders above the rest. Even beat the Astatic 575 IMO, as it was clearer and punchier with a better freq response. The echo portion doesn't scrimp on quality either, since it uses a top grade digital chip to synthesize echo, and is not muddy or adding distortion like the Galaxy units. The noise cancelling part of it works and has an on/off switch; but it is not the best feature in it. If you want a better N/C mic; you could do better.
Not exactly rare to find, but if you compare it to other mics with similar feature for 1/2 the price, it solidly puts the boot in their rears. It isn't cheap and there are a few sellers that have a few in stock, but they go for a ridiculous sum.
I no longer have one myself, as I traded it for a mobile antenna. Too bad they still don't make them new, as it was a real goer.