Pretty soon they’ll be sold like this:

Correct! An ungraded version is worth about $50k and a PSA 10 (“perfect” condition) can go for more than $2M.

Source

If you don’t understand someone’s code, be brave and leave a comment saying you don’t understand. If you can’t understand it, the next person who has to maintain it won’t either. It’s a strong indication that refactoring should be done.

Also if something breaks, just remember that you can roll back.

Good luck!