If you ask me I would tell you this is not the best time for buying anything like this and your parents probably said the same thing, but if you saved some money for this on your own, I guess you deserve it. First of all I know for sure that Apple controls the price of all its products very well, so you will not find significant discounts or differences in price for an iPod or for any other Apple product. Then you should consider buying a refurbished one or an used iPod if you do not have all the necessary money for purchasing a new one.

Then prices differ quite a lot according to the model you choose, so the simple models with less features can be bought for a lot less than the full-featured devices. Or you could wait for the special sales on the holiday season when Apple offers special prices, but I wouldn't expect to save too much, as these products usually have tops 20% discount.
If you want to know who sells the cheapest iPods I think you should look for yourself because you are the only one who knows exactly what you are looking for. But I can give you some ideas where to start looking. First you should try the eBay and the Amazon, because they are famous for selling products for very good prices.

Then it would be a good idea to visit the web sites of the companies that are officially into this business: Apple and Best buy, or you should consider visiting the following web sites and compare prices and decide after that: , www.geeks.com, www.tradekey.com and www.ebay.com. Just study all the offers and prices carefully and also consider the shipping expenses before ordering and only after that decide which one sounds more appealing. Just do not hesitate to visit the stores in your area first because you might have a surprise and find a good deal right there, in front of your eyes.