According to Plan (Sexton Blake Library No. 139) third series

30 day return guarantee, with full refund including original shipping costs for up to 30 days after delivery if an item arrives misdescribed or damaged. With this in mind I will send photos of the item to all overseas purchasers and won't dispatch until I have confirmation that you have seen it and okayed it, please ask for photographs of the item if you are not sure in UK. Return costs are expensive esp overseas and bookshops don't make money as it is. I don't have any control over when international orders will arrive. I use royal mail and only charge the actual costs. They quote 2-12 weeks time for economy post which is the closest in cost to biblio postage costs which are almost never enough to cover the actual costs. UK domestic postage is about right, i still loose if it's large and i have to take it into the post office where they charge 30p more for the same stamp i can buy online as there seems to be a conspiracy to force everything online and close down post offices and small businesses.