You might get some value as a museum piece. I gave my original iPad to a relative years ago. I've since moved throught several generations, again giving them to relatives. They all get value from them as they do not need the latest generation software/applications. I can still support them and they do the work required.
Technology moves at a fast pace. I now have one semi-obsolete iMac and two that are 'beyond hope'. However to less fortunate friends and relatives they are 'state-of-the-art' and meet their needs entirely.
Your only option is to sell the iPad and buy a new one.
How to Sell Your Old iPad http://tinyurl.com/85d69lk
Other sources to sell.
eBay Instant Sell http://instantsale.ebay.com/?search=ipad
Sell and Recycle Used Electronics - Gazelle http://www.gazelle.com/
For instant gratification in selling a used iPhone or iPad, Gazelle’s Gadget Trader, an iOS app, is tough to beat. In seconds it detects the device and reveals how much it is worth in good condition. Tap the Sell This Phone to Gazelle button and the deed is done.
Sell Electronics for Cash - Next Worth http://www.nextworth.com/
Buy My Tronics http://www.buymytronics.com/
Sell Your iPad http://www.sellyourmac.com/mac-product-guides/ipad.html