You're better off sticking with what you are doing right now, the profits are probably bigger. 90% of the stuff you can get from any of them companies you listed in there is cheaper on eBay unless you're ordering HUGE bulk. So until you have a fat wallet, I wouldn't recommend wasting your time on any of these companies.
There is a way to do this. Its theoretical.
Get going with one of the companies listed in this thread.
Get an eBay store and then just list like mad.
YOu have to list thousand of items, so its going to take you about a month or two.
Some of your item will be cheaper and then some you will have on hand when no one else does or not many.
Your then making money simply by volume.
If you have 5000 products listed you are reaching so many people as you have 5000 different products. You basically are bulldozing your way to sales.
5000 x .03,05,10 cents. Call it 5cents on the average. Thats 250 $ per month
plus the store at 15.95. So it costs you 265.95 per month to do this.
Then post all of those listing to google. You now have 5000 items on Google.
Make sure the listings have the item model number and the most popular name.
This way when you post to google it can be found by those means.
Not a good idea to do this on a new account.
Now post some loss leaders to auction. So take about 200.00 worth of product in the under 10$ range and list them at .99 with fair shipping.
In each of your listings make sure to tell your bidders that you have 5000 products in your store.
This is theoretical and not proven.
Your never going to find many companies that sell new items at wholesale that can beat ebays prices. Because liquidation product sellers like myself can get the same items cheaper.
I guess you won't tell us where you get your products. LOL