What to do with broken iPhone 3G?

A friend order an iPhone 4 to replace his iPhone 3G which has a cracked screen. He offered it to me.

I have AT&T on a family plan with no text or data. What should I do with the phone?

I'm open to suggestions, but I'm considering...

• fixing the screen and then selling it. I'd put that money towards purchasing the iPhone 4 with a data plan.
• fixing the screen and keeping it.
• selling without fixing the screen.

I guess I could keep it without fixing the screen too, but...

You can buy very cheap screen replacements on ebay (about AU$30). I have fitted one of these myself, it is not too hard.

I sold mine without fixing it and got a nice price on ebay.