That was easy my client was a realtor looking to buy a Repo for her grandson she had not made an offer on the home at the time of inspection and was wanting to know exactly how much money was going to have to be spent to make it liveable so I exceeded my SOP by troubleshooting that old piece of junk.
I put my gages on the unit and it only had 10 PSIG of Freon with the unit not running. The condenser fan motor had bad bearings and would not come up to speed. So basically she would be looking at the cost of motor replacement finding and repairing the freon leak re-charging the unit. Due to age I recommended not spending any money on the unit just replacement.
Just like RR I gave her choices Repair a junk unit or replace it with new.