If I have a donor will I have to pay for plasma?

Yes, you will still need to pay for plasma even if you have a donor for following reasons;

1. The cost for the operation of machine 

2. The cost for Lab/banks infrastructure such as equipment's, manpower, storages etc.

To keep a bank/ lab operational there are running expenses which are the sole reason you will have to pay for plasma no matter what. 

So, next time give it a thought before you label any bank/lab as corrupted or thief . They are also working where the have to come in contact with Covid patient's sample and more often then not to Covid positive people. They are as much at risk as a hospital staff/doctor. 

Disclaimer: All the information here are based on best my knowledge, research and observation. I advise you to confirm any or everything with your consultant before making any decision. My aim is to merely provide info and answers for guidance, so you must make your own informed decision based upon the advise of your consultant Doctor.