Did they pay separately or in one hit?

ie Does Paypal show one or two transactions. If two, an unscrupulous buyer can claim INR for one if you send them together.

I would just send them anyway if you're prepared to run the risk (which I would and do), but I have to ask, why are you sending envelope sized items registered? Most of your sold items don't seem to be worth enough to warrant registered. You're probably costing yourself money as buyers generally factor postage costs into the price they bid at. And your competitors probably aren't charging as much as you for postage.

twyngwyn - there is no difference to refund. Combined will be more than the postage charged.

Ps I wish I'd seen those boney books. They're worth a lot more than that.