Can a used completely disconnected cental A/C unit be tested in any way??

Question: If a used 2017 A/C unit is for sale (supposedly was attached to a home that burned down) is there a way to test it or is it just a roll of the dice??

Thanks.

source https://hvac-talk.com/vbb/threads/2238755-Can-a-used-completely-disconnected-cental-A-C-unit-be-tested-in-any-way?goto=newpost