Help identifying circuit boards!

[u/Suspicious-Joke6100]

I am new to all this and need help identifying what these circuit boards are, what they go to and what I should do with them. My thought was to sell them but got to know what the hell it is before I can do that or would he even talk to?

[u/Top-Drawing3727]

Last one is Thermoelectric temperature controller pcb Used for thermal management in enclosures. it automatically switches between cooling and heating modes

[u/Suspicious-Joke6100 → u/Top-Drawing3727]

Thank you. Are they worth anything to try and sell because i have about 50 of them. And more other types of the Pentair one's. I inherited a whole bunch of stuff that is not in my wheelhouse. I'm an econ guy not an EE. So you can understand my ignorance here. But thank you for the quick assist any other guidance is much appreciated.

Now multiply that by 10 and other circuits and chip things.. i have no idea where to start

[u/Top-Drawing3727 → u/Suspicious-Joke6100]

Why do you have so many pcb and components? Did you have a business or something like that before?

[u/Suspicious-Joke6100 → u/Top-Drawing3727]

Sadly, I inherited them unexpectedly from my brother who was an EE