Due to the new tax laws in the UK, any orders placed that are to be shipped to an address inside of the UK must be valued at £135 or more. Since the exchange rate fluctuates the USD amount will vary.
Currently the UK VAT law states that any sale valued under £135 will require the company selling the product to collect and remit VAT. Requiring registration with the UK and record keeping of all UK sales. I'm simply not willing to deal with that.