Shipping charges for this item to United States: $8.36
I bought these tubes for a 'ghetto tubeless' setup for DH, as recommended in this tutorial http://www.ridemonkey.com/forums/f19/ghetto-tubeless-conversion-diy-tips-tricks-240026/
They're a great product and hard to find in the specific size I needed! Merlin's service was great as usual and the set up went without a hitch :)
The last one I replaced lasted close to a year.