I have 4 window AC units I no longer need, as I had a heat pump installed
1) a Toshiba one that no longer has the side panels, so you’ll need to buy replacements or rig something up to fill the space next to the unit when you put it in the window. $40
2) hOmeLabs Window Air Conditioner 10000 BTU - $400 new - never used - $200
3) two x Frigidaire Energy Star 5,000 BTU 115V Window-Mounted Mini Air Conditioner & Dehumidifier x 2 - $180 each new.