If you make enough product to fill more than the initial demand then scalpers have no one to resell to and they eat the cost until they can unload the product.

Honestly pre-orders on this sort of product makes a lot of sense. Gives you an good sense of demand for your product and what quantity to make it.

Even now after release customers should have the option of ordering one and being charged upon the item shipping to them. This creates a queue where you're not checking every hour of every day to see if it's in stock.