I think it all depends on how old your ipad is and what your budget is and needs are.
If yours isn';t that old and is still covered by the warranty it might be a free replacement. If it's out of warranty then the fee starts at 219 for a mini, 249 for a 2 and 299 for the newer ones....but you will get model for model...so say your iPad is an iPad 2, do you want to spend 249 for essentially a 3 year old device, or put the money towards something newer?
I think first I'd make an appointment at your local apple store and have them work on it/diagnose it and then go from there. Just make sure you make an appointment before you do so you don't waste time waiting.
http://www.apple.com/support/ipad/contact/