High end would be the high end of the market components, right? So RTX 5090 ($2k+) or RX 9070 ($700+). High end CPU would be Ryzen 7 9800X3D for $400. Add a motherboard and copious RAM and you’re looking at $2k+ for all AMD, $3-5k for Nvidia.

Mid tier would be somewhere in the middle, so cut those numbers in half ($1-1.5k). Low end is what you can get away with, so cut the mod tier in half again, though going below $700 would be hard for anything but the most casual of games.