What!! if you bought a years supply of hard drives to sell on and you sold out in 2 weeks you'd be dancing in the street. Demand = supply is great demand greater than supply is still great and both are better than supply greater than demand.
No. If you bought a year's worth of harddrives and sold them in two weeks, then you sold them for far too little money. You always want demand to slightly exceed supply where feasible; you do not want demand to crush supply or vice-versa. If demand is too high, this is when you crank up the dollar figure.
You and I, as consumers, want them to just sell it cheaply and quickly. But as a business owner (especially one that is publicly traded) you have an obligation to maximize value. To use your example: if you bought 365 drives and sold them all in two weeks (26 drives per day) for $5 profit each, sure, you could undercut your competition immediately. But then you'll be out of stock.
Instead, you could also sell the same 365 drives for $50 in profit. Are people still going to buy your drives, when your competition has nothing else to offer as well? Sure, but not in great volumes. So rather than selling them in two weeks, perhaps instead you sell them in three months. Or maybe you get greedy and sell them for $100 each, but it takes nine months to sell them all.
Let's compute the three differences:
365 drives at $5 profit each, sold out in two weeks: $912.50 per week in profit.
365 drives at $50 profit each, sold out in three months (91 days): $1403.84 per week in profit.
365 drives at $100 profit each, sold out in nine months (274 days) at $932.48 per week in profit.
Selling them all at $5 profit is the bottom end of the curve -- sure, you can sell 'em all and then celebrate, but you have zero income after two weeks. Selling them all for $100 profit is the top end of the curve -- yeah, you make a but-ton of money when a sucker buys one, but you really don't end up making more than at $5 because sales are so ungodly slow.
There will be a sweet spot, somewhere in the middle, where a specific price point drives sufficient sales and margin to maximize business value. In that imaginary middle number I created where each drive generates $50 in profit, your business only sold four drives per day instead of 26 drives per day, and yet made almost 50% more profit per week. And you'll have cash flow for three months instead of two week. Why blow your wad all at once? This is basic economics, you can probably take a class at your local JuCo for ~$125 for the three credit hours.