Akai LPK 25 is like $50 brand new, so is LPD 8 if you're more interested in pads (MPK Mini gives you both for $100 new). There's cheaper options out there, but that's the cheapest I know from a well-established brand.

Even if you have no interest in music, get one. MIDI is super easy to read, you can DIY something like an Elgato Stream Deck for a third of the price, physical volume knobs included. It's up there with a Raspberry Pi for the coolest cheap gadget.

Impulse buy: https://www.amazon.com/Donner-N-25-Controlle-Velocity-Sensit...

and if you want to get fancier with sliders and drum pads:

https://www.amazon.com/Donner-Keyboard-Controller-Personaliz...

or perhaps:

https://www.amazon.com/AKAI-PROFESSIONAL-MPK-Mini-MK3/dp/B08...