One downside...
I just got one today that's used. It's just a 16gb wifi one and it was about $200 cheaper than what I'd pay for it from Apple or another retailer. It's enough to get me through until the 4g one comes out. It's fine and barely used. The woman I bought it from got it as a present. She's just not the type to use it and decided to sell it, so nothing seedy is going on.
What I didn't realize, however, was I ought to have completely wiped it by erasing all of the data because as soon as I logged into (or tried to log into) iTunes, it disabled my iTunes account. Great! Just great! I'd removed iTunes from my computer because my hard drive crashed. All my stuff is stranded on my iTouch. I'm going to have to rescue it now, for sure, so I can sync playlists to my iPad.
It makes sense they shut my account down because, technically, when I tried to log in their system had this iPad linked to someone else. Also, they had my info linked only to my iTouch. They're probably thinking someone stole the iPad or just got my password and is trying to download stuff.
Anyway, after a LONG time on the phone and having them try to up-sell me to Apple Care. I got lucky and had an Apple rep help me but it ends up it didn't solve the problem. I called back and got someone much less accommodating and spoke to a supervisor. Found out later that the first rep shouldn't have helped me at all. (Really hope he doesn't get into too much trouble.) The supervisor explained the 90 day Apple Care set up and explained that my iPad isn't covered anymore, so they'd have to charge me almost $30 to help me.
Now, honestly, I think that's rubbish because I just want my account enabled again so I can go wild in their iTunes store. They basically want to charge me to shop. Really stupid, to be honest.
However, I can't fight the power so after grumbling to the supervisor a bit, I contacted customer service via email. Hopefully, they'll sort this out in a day or so. An iPad without apps is just useless.
Sooooooooo, that's a warning to anyone buying one used. Go to settings, reset, and erase all content and settings. Then sync it to your iTunes, so that Apple recognizes it as your iPad before trying to buy apps or you might get locked out of iTunes like I did.
Update - Nov. 3rd:
Indeed my attempts with a reset were futile. However, I just got it reset by the folks at Apple and am now running wild in iTunes to find iPad apps I want to use.