How would you respond to this e-mail from a bidder?

[Gameboy]

I'm selling a number of bits of kids clothes at the mo.

I've just had an e-mail from a bidder saying this:

Hi there,
Just to say I've bid for both the XXX and the YYYY, so if I get both one package would save on postage for you. Thanks.

The bidder only has feedback of 1, and for some reason it's making me feel uncomfortable - like it's a veiled threat that they're only going to pay postage for one or something?

What do you reckon - how should I reply?

You get to decide if you want to combine/reduce postage and by how much so if they win both you could offer a reduction if you wanted to.

If you didn't want to and they bid and won then they would have to follow the terms of the auction.

I would reply and say either you do offer a reduction for multiple purchases or you don't - by making sure you respond through ebay.

Then its clear and they can decide whether to bid.

It seems a bit Irish, in that I mean its like an email you as the seller would send to a buyer as they are paying the postage not you in reality.

Why not say you will wait until the auction ends, as she may not win both anyway.

If you're happy to do a postal discount, ask them to email you for an invoice before they pay if they win both items.
If you don't want to do discount just tell them that. If you haven't specified postal discounts in your listing you are not obliged to give a discount.
If it was me I would have just asked for a discount - maybe they were just being polite!!

how long to end of auction?

i'd ignore the email for the time being.