Estimate for circuit board replacement

I sent my camera off to Canon to have repaired, and I got a very expensive estimate with the diagnosis, as was my initial thought, that it was the circuit board. I had Canon send the camera back without repair as with their estimate I would probably put that money towards something mirrorless. However, I am checking to see sow much to replace a circuit board and a Canon 1dx? If considerably less expensive than Canon I may go ahead and do the repair. Thank you.