Ok, You have to be carefull here.. buying a ship only is possible. So be sure you get a package WITH Alpha and Beta access.. think you need a $60 package for a $55 ship (300i?) with alpha/beta access. If you already pledge you can melt it back to credits and upgrade to the correct package.
Think what they call Alpha and Beta is a bit confusing because they builing it in modules and release them one by one for the Pledges to test/play with. Not sure when something is called Beta..