Congradulations this is the way of the wholesale market. Sometimes you can find some good deals but most of the time , if your buying wholesale to sell on ebay it can be a lost cause. Especially if your sinking into a heavily saturated market like Ipods. Lemme give you a bit of advise. Stay away from high end electronics. I know many sellers that sell ipods, xbox 360's and other high demand items. Yes they sell fast, But those sellers generally only make a few bucks on them. You can find tons of other items you can buy in bulk below wholesale and turn around for much better profits.
If you have money to spend on ipods then why dont you put that money into buying pallets of overstocks and liquidated merchandise you can get for pennys on the dollar rather then wholesale.