Some really good deals come on ebay but you have to be clever. I have just bought a new ipod nano 5th generation for £60, for dh's xmas present. I really couldn't aford £100 for a new one.
Instead of looking at items ending you need to keep looking at newly listed buy it now for what you need and if it meets all the criteria and is a good seller snap it up. Otherwise its waiting for a discount code for places like debenhams.
If you do buy on ebay check it and set i up straight away so you know it functions - although you still have the Apple warrenty to fall back on if it is new.