Out of the ones you chose, D70 would be the best bet
In the end, stick to Canon or Nikon
Not sure if you noticed, but the guy selling the D70 has 0 feedback, so I'd be weary of buying it from him.
You're better off paying a little more and buying it from a store locally so that if something goes wrong, the warranty is easy to deal with, if you buy from ebay, it's usually from Hong Kong, and I know that Canon Australia won't want anything to do with it, I'm not sure how Nikon warranty works.
Problem is, $1200 is a very tight budget for what you're asking, realistically in that price range, a D50 with the kit lens (17-55?), or a 350d again with the kit lens is probably more plausible.
Or, you could forget all that, and buy a top of the range Point and Shoot camera, the Canon Powershot G7 or the Powershot S3 IS