Happy to combine postage on items, please request invoice before checking out for final total. Postage cost also includes the price for packing and i obtain proof of postage for all items, an email will be sent on dispatch of item. Cheques must clear before item is sent. I do not have any timescale for payment of item but if i haven't had any contact from the buyer in SEVEN days then i will send a polite email reminding the buyer that payment is due.