Postage costs are calculated to the weight and bulk of item. Multiple purchases will be calculated like this and a new invoice sent to incorporate this.
If you have already paid for multiple purchase before new invoice is sent, then a refund will be processed back to your Paypal account. This may take a few days to process.
I do not offer Free P&P as most sellers include this cost into the price of the product and on multiple purchases you end up paying postage on all items purchased with no reduction in product price.
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