they are discounted by 20% but they are already nearly 50% cheaper in the first place due to the $/£ exchange rate!!! The carts work out to about £30 each! i have just bought 2 mats, a cart and including delivery from the US I have paid £41!!!

However you do have the problem that you can be charged customs as you are importing them into the UK - so there is always a gamble, however it doesn't seem to happen very often and I think it still works out a bit cheaper.