If you are ok with a 4 gen. I would go through Apple and get a refurb. they come with a warrenty; otherwise, watch Target when they have their gc deals. You may not be paying less but you can use the Target gc to get $ off a Disney gc.
I would not suggest Craigslist or buying one used with out a warrenty of some sort.
One of my DD got a 32g cheaper through Apple than what the other DD paid for a 16g at Target (even with the gc).