If you are a dumbass like me, you have to buy a replacement Arduino Board and a RAMPS board, plus possibly stepper driver boards. But only once. (I am a quick learner).

I have a MakerFarm Prusa. I find that I have to replace the nylon tubing that connects the Z-axis screws to their steppers. At $1.20 per metre, that's not a big expense.

Old Man Emu