You’re making an apples to hand-grenades comparison. If you can find a shredder for $500 shredder off alibaba (every one i clicked was actually $1000 not including shipping and tariffs), it is likely going to break immediately if you stick anything bigger than a solo cup into it.

A machine equivalent to the precious plastics shredder will likely cost you a similar amount. Probably more with shipping… and tariffs until the taco tacos.