An acquaintance of a friend of a friend of mine created this website:
http://blackfriday.gottadeal.com/
It has all the best deals you'll find on Black Friday. Yeah...check out the site and try to find the absolute cheapest/free stuff. You can make some quick cash, sure. I've done it. Although, not everything you buy will make you profit on eBay because stuff on eBay is already usually dirt cheap. Try to check out eBay before-hand to get a feel for what would sell good.
For example...I just checked out the site...and Gamestop will be selling GTA3 (PS2) for $2.99. It's selling on average at $4-$5 on eBay plus shipping. That's not a very good margin, unless you buy like 200 of them.
BUT, Grey's Anatomy Season 1 DVD will sell for $8.99 at Circuit City, and the average sale price on eBay is $17-$20. You buy a couple of those and make at least a couple bucks on each, not to mention profit on shipping as well.
Here's another I just found...19" Proview Widescreen will sell for $129 at Circuit City...and they've sold for up to $200 on eBay, plus shipping. That's over $50 profit a pop.