Split AC Units 2

2 split AC units, I bought them used about 8 months ago from an air conditioning shop, and now the building has been rented to workers. One AC unit is connected to the network; these pictures are from when it was at the shop. When installed, it had strong cooling, but now for one month its cooling has become weak. The other no longer holds refrigerant because I haven't operated it for over 5 months since I am alone and haven't brought an engineer to check it. I am selling both at a price suitable for me; whoever buys them should take responsibility for dismantling them and hiring an engineer.