Hi, venezuelan Strida, I can help you with the seat pin and the shipping can be under 10.00 from Canada. My site may have provided you with a shipping cost but as I ship very little to Europe it may not be accurate. The best thing is to contact me with your shipping address with my email, bill.wilby@stridacanada.ca The seat pin can ship in very small envelop.
Also to note for Strida Fans viewing my web site, my costs are in Canadian dollars, which at this time is 15 % less than the USD
Cheers, Bill http://www.stridacanada.ca