iPad Air 2 9.7in Wi-Fi + Cellular Trade-in Price History
The trade-in price history of iPad Air 2 16GB WIFI Cellular generally shows a decline. In other words, the used prices of this device are dropping as newer models come to market. It is only very rarely that a second-hand electrical device will increase in price; this usually happens for example if it's a collector's item. Therefore if you are looking to sell your iPad Air 2 16GB WIFI Cellular then it probably makes sense to do it sooner rather than later - before the next price drop.