After all, what need is there for a secondary market in current goods if the factory NEVER RUNS OUT OF STOCK???
BINGO!
And if scalpers don't EXPECT the store to run out of stock, they're not going to buy 20 knives in the hopes of reselling them at a profit on the secondary market. And then the likelihood of the store ACTUALLY running out of stock diminishes because people aren't buying 20 at a time.
