Haha, there's no benefit for the Apple Store guy to discount it, even if he could. And for the record, a manager can cut the price if necessary... but it won't happen for an iPod Touch.
If you came in as a business customer and loaded up with ProCare, AppleCare, Mac Pro, a lot of software, etc THEN you might have a case. I've witnessed such cuts. But only because they knew the odds of return business were pretty high.