Well he is able to make decent amount of money just fixing them, for what he pay for and the amount of money he can make off these units, you probably looking at at least 60 dollars per unit, so he is looking at like $1200 profit, It is easy if the person knows how to troubleshoot and solder.
He and because I love to open up broken devices are the reasons why I'm actually fixing my third Nintendo switch.
1. Broken M92T36
2. Broken screen and patched
3. Not sure if EMMC or BQ24193 (actually waiting for parts)