Here is the thing none of them will tell you until you there and ready to buy.
for the 199.99(either it has to be new service line, or single line turning into a family line)
if you have a family plan with 2 or more lines, and adding another, or if you have a family plan, and renewing one of the lines, or single plan and renewing your plan, IT WILL COST YOU 299.99
By the way I work part-time at The Shack, so please be aware, and not go thinking the price you see is the price you get