Hello i recently purchased 2 20 pound c02 tanks that are empty and have not been filled. I ended up not needing the extra tanks i purchased and because i was so busy i was not able to return the tanks in the time frame of the sellers policy. I have the receipt with date of purchase and how much i paid. Asking for $100 for each tank unless you take them both off my hands ($180 for the 2) . I can deliver if the trip is in a reasonable distance. I will not be coming to your house as well as your not coming to mine, we can meet at a public place. I also have a slip that needs to be taken in when you get the tanks filled for the first time. You can reach me via email at [email protected] and i will respond immediately same day.