I have no idea what it will cost to manufacture the tether (I will be finding out soon), but I'm hoping the dealers will be able to sell a set of them for $15 - $20. I figure that preventing the hassle of having to go buy one in the future is definitely worth something. Plus, as I sell more, the manufacturing costs will go down, and then I can lower pricing. Who else would be interested in this product?
I'd rather be cutting grass...