iPod Touch (5th Generation) cannot charge?

I just recently saw an ad on craigslist of someone selling an iPod Touch (5th Generation) for extremely cheap. The catch was the battery could not charge. Considering how cheap I got it, I figured it would be a simple battery replacement or such that I could find online and I would have a like-new iPod Touch. The only issue is I cannot find any solutions to this exact problem. Basically what has happened is, no matter where I plug-in this iPod, I only get the empty battery logo with the lighting bolt underneath. I have tried changing cords, and changing where it gets charge from, (my computer, wall charger, iPad charger) and it does the same thing. I have even tried leaving it charged for over 30-min+ and it still does not charge. I do not know the history of this iPod, but it seems as though I can see 2 very small dents on the back of the iPod. I have attempted all the basic diagnostics on this iPod

The iPod is :

iPod Touch 5th Generation 32GB (Pink)

Any feed-back is much appreciated.