WTB Mac mini M4 and keyboard

Hi everyone,
I am looking to buy a Mac mini M4, preferably with the following specs:

10-Core CPU / 10-Core GPU

16GB or 24GB unified memory

512GB SSD

I am also looking for an Apple keyboard, preferably a Magic Keyboard.
Prefer items in good condition with original accessories.
Can pick up on or near campus.
The price is negotiable depending on the model and condition.

Thank you：）