I first started by going to the "business" line and asked if they had any new crisp bundles of $5 and or $10 notes. It took a few moments but most were happy to help. I found that by explaining to them what your goal is they were there to serve you as a customer...then a friendship started, go into the bank call them by their first name, be friendly, ask about the family, talk about the weather, this will make them feel more comfortable with you, and also go in every couple of day's if you have the time. When you feel comfortable, ask than about placing an order with the BOC for your denomination of choice. I've paid between $14-$24 per brick.