That just isn't the case here. $20 dollar bills have a monumentally larger number of consumers interested in them than Masters 2017 boxes. Buying in bulk for a reduced rate applies to any good, no matter the rarity, when you are dealing with large quantities. Even more so if its a niche item. To give an example, if you had 200 Scooby-Doo lunch boxes from 1973 worth $140, its only worth that money if you can find a buyer. If you cant, they're worth nothing and just taking up space. If someone came to you and said "I'm buying all 1973 Scooby-Doo lunch boxes I find, but only for $139 each, you might be tempted by that deal, even if its a loss on the going rate, if you aren't getting better offers (or their value is dropping; or they're costing you money to store). We've both made examples of the extreme ends of the spectrum; reality is always in the middle. As long as the seller is selling at a profit, most will be willing to sell at a discounted rate for a larger order of product. There are many factors that enter into it, but the bottom line is, in business everything is negotiable if the moneys right.