AT&T currently has a prepaid 8GB plan for $25 per month when you prepay $300 for 12 months. Here is a screenshot for reference. Note that you do need to get an AT&T SIM card for an additional $4.99.
data plan
Samsung Galaxy Note II 4G Android Phone, Titanium Gray with Verizon for $149.99
Samsung Galaxy Note II 4G Android Phone, Titanium Gray with Verizon for $149.99 with a 2-year contract. Here is a screenshot for your reference. It is worth noting that at the time of this post, it has received extremely positive overall user reviews. This works out to be about half of what it goes for at most places.