It won't work for everyone. Trust me, you're better off buying from online channels then from a large store in real life.
Most of the stores are delineated to a specific agenda and they won't even sell to you, the ones that do have a chip on their shoulder or a pre-conceived idea of how things will go.
Best Buy is a corporation. Unless you have paperwork, its not even advised to deal directly with Best Buy and try to buy all their stock off them - even overstock.
If for instance you want a particular item that is being liquidated, you're better off going to directron.com or an affiliare store like zreiss.com. There not only will you get liquidated stock you can buy, but you'll get it at absolute discount or also in bulk.
The other option is to just simply buy bulk lots off liquidation.com and enter a liquidation sale, as they no matter what always have to get rid of all their supplies. They carry too much stock to start with.
You wouldn't have much luck just going into JC Penney's and hitting to buy all their Tiffany jewelry for instance. However some very good stores online I know of, wholesale stores, will let you have that merchandise at under 1/8 cost and let you buy a whole bulk lot.
They will also sell you truly good designer TVs, supplies, answering machines and other info products that are being liquidated.
The key to being a master of your business is to look and figuratively hunt for liquidation. I can find liquidation sales anywhere, if I know where to search.
One story I had me walking into my local mall outlet, the store in question was simply getting rid of all DVDs, games, and accessories.
This is known as a liquidation prime time sale. I simply bought a whole sack of goods for next to nothing and then re-sold every one of them with interest at retail-above prices- they never got any of that in stock ever again.
And of course there are always places who you may not know about that are going to liquidate their stock. These are often factory overruns, taken right from the spot site, approved and then released which you can then take all of them for resale.
The key is really in knowing where to look and what your niche consists of, what they are going to buy, and knowing your supplier. And the only way to completely do it correct is keep an eye on any places that automatically liquidate their stock. Its up for grabs and they want it taken away.