Advice on iPod return

So I was browsing on craigslist and I found a posting for a 6th gen nano for 140. I immediately contacted the seller only to find out he also had a 64 GB 4G touch for sale. I already bought the 4G touch at launch so I had no real need for it until he said he'd sell it for 450 for both it and the nano. Basically i got the nano for free (guy was like 18 he got them as birthday gifts, but wanted cash instead). So now i am trying to decide what to do, return my 5 day old touch and keep the new one, sell the new one and make back my monies worth, give it as a gift to my mom or grandmother (for facetime) and lose cash or... Idk. I mean i could return the new one to apple and make a profit, but that doesn't seem right. Thoughts? Btw got guys info and license plates JUST in case this is anything fishy. Very doubtful though cos the nano is legit and flawless