I'm just saying that when you're selling things, you want as many eyes on the merchandise as possible.  The larger the market, the more likely you'll be able to charge a decent price.  By creating a whole new site to sell random shit you have on hand, you're creating unnecessary overhead and severely reducing your client base at the same time, since building one sufficient enough takes time and, probably, significant advertising.

But I'm sure you already knew that since they teach it in day 2 of the walmart management certificate program.