Can I have some links for rats?

Ok. So for my birthday, I would like 2 rats. But I cant seem to find the right cage (on petsmart site) without it being terribly expensive. I told my dad I wanted something for my early bday present, and I have had rats before, and I LOVE them. I do not want any cage to be over 65 dollars. Again, enough room for 2 rats. Links? Thanks!