I have a collection of 12 paperback books which I was thinking of selling. (Horrid Henry) They weigh over 1kg so from what I can see Royal Mail would charge £4.50 for 1st class & don't do 2nd class for that weight. Standard parcels would be £4.41 & My Hermes (cheapest courier) would be £3.99 + VAT. So, how are other sellers only charging about £3.50 for the same or more books. Are they all making a loss? How can they do it? 