Guernsey post office

I got caught in a shower on my bike just after posting my stuff at the main post office! At least my post was dry! I received an early parcel for my birthday today and noticed that the postage from Royal Mail was £2.80. I decided to weigh it and if I posted that from Guernsey the postage is £8.77....more than triple the cost. That's why it is difficult to continue a mail order business from here as it is so expensive. Plus the VAT in addition to postage now levied on nearly all items leaves very little profit.