As advised by @elliottbnewcombjr
The idea and practice of having a Donor Cart' rebuilt is one I am a advocate of. It will be seen in other threads where I make known my experiences of this.
I will say that, not Al Donor Cart's are able to be rebuilt to a Spec' that resembles the original model and some are not going to be rebuilt.
It does depend on the Service Selected and the evaluation of the Technician.
This will not suit all, but it is my arrangement I make.
I buy a Donor Cart', as model to undergo a Inspection and Assessment only. I don't kid myself I am buying a rebuild able Cart'.
Following the Assessment being a positive outcome, I let the Third Party Service know I am not holding them accountable, if the rebuild has a failing and the Cart' is lost. I accept the outcome whatever it is.
The only thing I ask, is that if parts have been purchased and are being charged for, if these are salvageable, I ask these are stored for a future attempt, when another Donor is available.
Obviously not everhbodies ideal, but to date this has worked out fine, and a Third Party Service does feel better for it, as they can't guarantee 100% success on all attempts to rebuild.