you need to find a supplier of wholesale anything.
thats not really something dropshippers share info on. its not hard to compete against the most popular seller on ebay for a certain item if you found yourself a good connection, where you can price compete easily.
some websites are more then happy to have you as a supplier (although they have many more people they work with so you compete with them pretty much on ebay)
get yourself a legit business tax ID, as the best of the suppliers demand you have one, the ones that dont usually you know suck.
we sell computer parts, and other electronic thingys.
the fun of dropshipping is you dont need to buy bulk anything, or even stock your own items anywhere. you grab the info and pictures right off the supplier's site (usually private login for members area)
and you set up a sale for that item yourself on your ebay seller account. you need to at least hit that minimum amount of sale, to buy the item from the company.
but obviously you want top charge as much as possible for most profit, carefull of competition prices on ebay.
once you sell it and recieve payment you go to your supplier and buy the item yourself just as any checkout on any website, then put that ebay buyer guy's shipping address in there. keep the profits. The company had it stocked for you, and the buyer had no idea it came from elsewhere as a good supplier will label the package "from bisjac, ebay"
i sell computer monitors and flash drives mostly, making anywhere from $5-10 personal profit on the flashes, and the few monitors i sell every day earn me 40-100
repeat 300 times a day, all day, every day.
its like a obsession, you cant stop once it starts up x.x