If you want to buy the 3G Vita, this one comes with a free 8G card and a PSN game.
Even if you don;t plan on using 3G now, I'd get one "just in case" you want that functionality after buying it. I know a lot of folk who bought non-3G iPads then sold them to buy the 3G one.
The 3G data plan on vita is month-to-month.
http://www.cinemablend.com/games/Pla...ced-39026.html