Inside where? The BEP? No. A bank? Yes. But that is no different than any number of people including myself who have bank tellers hold interesting notes for them.
I guess I just didn't realize a bank would hold 12,000 specific notes for you by a simple request. It must be something that is more common than I thought.
But would it be worth your effort to complete the sale if there wasn't any profit in it? The bank is going to give you a dollar for a dollar. The fee by the bank for handling the transaction, would comparatively be a minimal charge. But I don't think they would go through this for the average person, not just for collectors sake. They would need a reason more credible than that.