I was waiting at the nearby DIY shop (i think I made the problem worse but I digress) and noticed that all the price labels offer a discount if you buy in bulk, 3 or more. They offered four or so tiers of discount the more you buy. an Interesting approach that I wonder could port well to museum shops. We already buy in bulk. We know what products sell well. Buy 3+ prints at a reduced rate for instance. I’ll see if we can experiment with this approach online. I’ll Let you know if we get anywhere.