Assuming it's clean, start with Magnaflux.
Then break out the mics to see if it's round and straight, or if has already been cut.
Then check for runnout. (See if it is bent)
If it passes all that, strighten, grind, chamfer, polish, balance.
Oops. It's a brand new crank. Untouched from what I understand. I basically would like to. Check for roundness and runout then plan on selling it and any other work done by the person I am selling to during their build.