UK Postage: I have always combined postage but eBay have introduced Simple Delivery which has affected invoicing etc. I no longer control the postage. You should be able to combine postage on checkout. If you need any help just message me
Single and two comic books under £5 come in an large boarded envelope and then anything over two are sent in 'book wrap mailers'. These can hold up to 10 comics securely. Anything over 10 will go in multiple packages taped together for added protection.
Postage to Europe: I am not liable for any customs charges if the books are heading out of the UK – leaving the EU has attracted some charges when posting to European countries. I complete the necessary customs forms but they sometimes do add import taxes as per their rules.