I have an iPod wall charger. It works with my iPod nano 3rd gen. Not sure if it is compatible with the iPhone though. This charger is a generic which I bought for $4.5 from ebay including shipping. I suggest you purchase a brand new piece directly instead of getting a used one.
I also have an apple USB charger which a friend gifted me. It is supposed to work with iPhone 2G(not sure for 3G) and all iPods.
Pm me your price if you are interested in either