Congratulations. But basically, I wouldn't sweat it -- you wouldn't be likely to get more than 10k added to your salary, and since Amazon is very much a late-stage company, I wouldn't expect much from any equity slice offered.
It's your first (bigcorp) job, after all -- just grab it for the spending money + experience. Then "flip it" into a much higher paying (and probably more interesting) job 1-2 years from now.
That said, it's always good form to delay the acceptance process ever so slightly: get everything in writing, and ask if you can have a few days to think about it (specifically asking by when they need a response), rather than just agreeing to everything outright over the phone.
But if it's in another city and you'll have to move, then by all means do ask for "relo" expenses (not sure how much, but it could easily cost you $6k+ out of pocket, when everything is factored in -- so keep that in mind).
Have fun!