Good MM/MC coil cartridge for $100?

Forget MC at that price (not aware of any) and beware of used MC cartridges. Too many scams.

I recommend the Grado Black, but if your turntable hums, it will pick up the hum.

I also recommend the Audio-Technica VM95E and VM95EN, but you have to follow the manufacturer’s capacitance recommendations. Don’t understand all the praise for the 95C.

In my estimation, the Nagaoka MP-110 is quite good for the price.

Many people hate the Ortofon 2M Red, but I’ve listened to it with a wide variety of equipment and consider it a bargain. Don’t know what they’re hearing.

I don’t recommend the Goldring E3 at $189. (way too much treble for my tastes), and as such I consider it overpriced since I’d rather have an Audio-Technica VM95E, VM95EN, Nagaoka MP-110, Ortofon 2M Red, or Grado Black, all of which cost less.

I don't have your preamp, speakers, room or ears though, so I have no idea what you'll hear.

I forgot, my friend had hum, and it turned out to be the Grado cartridge that he somehow got. Steve Leung mentioned to him that Grado’s sometimes hum, that’s how he found it.

He went to AT540ML, loves it, but it’s $280.

https://www.audio-technica.com/en-us/cartridges/type/moving-magnet/vm540ml

If you can return it, and you don’t get hum, Oh Happy Day.

I have a Grado Mono, no hum in my setup luckily.

If you stretch the budget just a little, you can get into an AT-VM95EN with the nude elliptical profile.

@viridian 

At some point, I’ll take another listen to the 95C. I’ve only heard it with one tonearm/turntable (Schiit Sol), so that might have something to do with my perception of it. 

I don’t have an issue with spherical styli in general as I’m a fan of the Ortofon SPUs with spherical styli, and the Denon 103 and Denon 103r. I only listen to those on one tonearm/turntable, but it’s a Denon DP-3000NE which I paid more than twice as much for.

Regarding Reichert though, he also recommended the Goldring E3 and had it placed in Class B of Stereophile Recommended Components. I find that cartridge to have way too much treble, but Reichert is significantly older than I am, and he probably can't hear that.