All in different ways, if you plan to sell a lot, then you need to know the nuances.
For example, I live in Russia, and I can buy a lot at one time. But our customs legislation makes doing a lot of small purchases otherwise be the duty of 20-30%!
Therefore, the majority of orders from Russia so strange look - in every job a lot of positions on a few coins, but such orders may be several during the day or a couple of days. Although, if I lived in the West - I would have done without prroblem a common order.
In general, I think that 10, 15 and 20 ounces - a normal practice or one tube / roll for one order.