I know that some boxes have little holes on the box so the customer can visually confirm all the rolls are in the box. If that's the case, I would totally look for years with the errors, but then again, you'd have to be able to choose between boxes.
But it seems you get skunked on a lot of CWRs but every so often, you get someone's change that's been sitting in a jar for over 20+ years and hit a silver jackpot.
If I was in your situation, I'd get a box and a few CWRs. Check the CWRs first and if it's decent, go back and clean them out of them. The banks I usually deal with, prefer to hold Bank Wraps since some customers won't take CRWs due to a better chance of not adding up or something I don't understand yet. But all banks are different so feel them out first, try to be chatty, because being friendly can get you information you would have never gotten.