[synapse26]

I guess it varies somewhat, but how much does an average competitive mouse costs?

[Zeetah]

Depends on where you draw the line.

I think one can be made for under $50 USD.

MCU: $5 PCB: $5 Sensors: $8 Motor driver: $3 Battery: $5 Misc. electrical components: $5 Motors: $4 3D printed parts: $15