Forget about trying to source the ipods and games machines first of, ebay is already set at wholesale and below in a lot of cases, and without buying in serious volume you will never find a supplier to compete with such a saturated market.
It's old advice, but still good advice in my opinion. Take a look at second hand items at places like yard sales, weekend markets, thrift shops and alike.
The items will cost you next to nothing in most cases, especially if you can talk a good deal, and if you buy right you can make a better margin than you would selling ipods.
It requires more leg work, but second hand does return good margin if you buy right.