Here, I've got a whole slew of suggestions for you.

There are plenty of places that will give you cash for your used technology. You can use a comparison site like SellCell that gives a quick estimate its value. I found a 32GB 3G and WiFi iPad2 is currently going for $342, assuming it's in good condition.

Gazelle offers a similar gadget buyback program and is offering $300 for the same "flawless" unit. That takes a nice chunk out of the cost of the new iPad if you're planning to upgrade. 

Another option is to trade-in the iPad and rather than get cash, get merchandise credit and the freedom to buy something else for your money. Perhaps you'd rather get a Kindle Fire or the newest iPod Touch--or even a new camera. To get merchandise credit for your old iPad, you can use Amazon's Trade-In program which gives credits your account with the trade-in value of your device; or use Apple's recycling program which and end up with a shiny new Apple gift card.

3. Donate it

Donation is always a nice option to consider especially knowing that an iPad can go to great use for so many people--and that all donations to accredited organizations is tax deductible.

For schools, app developer and dad Steve Glinberg started his own iOS donation program where he refurbishes old units (even non-working ones), restores them to factory condition, uploads educational apps and sends them to teachers around the country. It launched two years ago, but seems like it's still going strong.

Computers with Causes is another charity that accepts iPad and sends them to worthy non-profits around the country that need them.

Or consider iPads for Soliders, which gets them into the hands of our soldiers in Afghanistan so they can access the internet, keep up with their reading, or just stay in touch with family back home.