If you are ordering from the UK or EU, please note that Area 51 does NOT collect VAT. I am a one man operation, and I have neither the time, patience or desire to collect taxes for your country. The order will be declared for it's value on the USPS customs form and you will be responsible for paying the import charges there once it arrives.
Not so confident about getting under the hood of your wah wah? I offer a complete repair and mod service for many makes and models of wah pedals. Go here for the details.