Some people buy them with the discount and then resell them if they run up north away from FL. A couple of people who purchased multiple units for larger rigs up north and got free charts sold their chips for about $500 and they said they sold within a day. Works best on larger units as the discount is less on small units. FMT is selling as many units to northern boaters as FL boaters as they are looking for that "discount". It saves them hundreds on their purchase when compared to the other on line retailers selling the exact same thing. If you get free charts, its like a $500 discount on the equipment if you sell the charts. Pretty good deal and the chip buyers like it too as they save a little compared to buying direct from FMT.