I sometimes buy from Gems TV. They charge £2.95 postage and you can order as many items as you like in one day. Even if you buy a large item, like a ring box, its still only £2.95. I know they send all the items by Royal Mail but they have tracked delivery so how can they do it that cheaply when QVC charge so much to send out their jewellery items.
I too shop with Gems - I am a sucker for sparkly things and I have lots of lovely rings from them. As you say if they can send out all your purchases from the one day for £2.95, tracked, why can't QVC. Actually I know the answer to that one!