I bought an entire batch of the SRA-198 when I found them at $19.95/ea. I think well enough of them they are the backup mike for at least six radios.
I don’t have the experience of many around here, but I’m sure there no such thing as a microphone too many. Get at least one and don’t sweat it. Drop back in it’s sleeve, roll it up in bubble wrap, and store it in a desk drawer . . .
. . unless, like me, you want at hand a quick reference mike for any setup.
Alternately, take the blackjack or sap out of the cars glovebox. Store this instead. Swing that SRA at a parking lot Goliath and he’s going down.
It slices, it dices . . . .
.