Nobody said you had to run a business to understand common sense. "Nothing" in this world is guaranteed to appreciate in value as time goes by. Not stocks, gold, real estate and certainly not packaged digital media. Inventory cost means the money you put into buying the thing is not liquid. If you purportedly don't care about re-selling, then don't brag about it either. It just makes you sound like a newb.
As an aside, I hope seriously no one actually considers re-selling (as in just buying from retailers and re-selling as opposed to really operating a store, offline or otherwise) a viable sustainable business model unless you're in between jobs. It's a perfectly competitive market with no barriers to entry. Most of you don't have the cash flow to sustain the inventory costs. One big misjudgment on inventory value and you'll be losing money doing one of the most retarded things on the internet.