Bought from CEX used, it came with a 5 year warranty which I have a receipt for, and which I will include, however I don't know how their warranty system works as it might require my email, so in that case the warranty will be worthless for you, so there's a chance that if you buy this item you will get the warranty passed on, bought 2 months ago at grade B, I've cleaned it and it looks in good condition, I have also applied a screen protector upon purchase, the power bank has scratches but is insanely fast, if you charge it with the Ally's power cable it charges very very fast, any questions please ask.
eBay