Need some help --- recommend the best Burr Grinder under $100 --- if possible

Alright Team Shave Nook,

My wife and I need to take our grinding to the next level, and by that, we are attempting to find a decent burr grinder for under $100 --- I am clueless when it comes to these things --- I can tell you that we mainly drink coffee the following ways:

- Standard Drip - 10% of the time

- Keurig using our "pack your own" K Cup - 50% of the time

- Nespresso using my Capsul'n pods (for me, about 90% of all the coffee/espresso I drink at home)

- French press - 25% of the time

- Aeropress -- just now getting into it and maybe 15% of the time


Let me know what you recommend, I am not opposed to used or refurbished as long as you all can recommend a place that does it with quality.


Thanks,

Jason