I don't have a set amount in mind. Realistically I think around $100 US would be practical but I'm flexible. I guess it might be worth trying to see how many people are interested first to get a better idea of cost. It seems from the new threads that more people are gaining an interest. And with the amount of new units sold recently there might be enought people to get a reasonable price. (Waiver of the one time fee would make it easier to justify).