I think when it comes to QVC any sense anyone had goes out of the window. Yes, I've bought the same t -shirt, vest top, summer top in a few colourways before because they've usually been dirt cheap and not only that in the summer months you'll be wearing that sort of thing day in, day out and the garment is right next to the skin. I have never, nor do I know anyone who has ever gone out and bought skirts, blouses, trousers in all the available colourways. All it seems to take for some people is to hear the presenter or BA utter the words "I'd be buying more than one if I were you" for them to think "What a good idea" - add that to the sense of urgency they give, eg "XL is looking vulnerable, that'll be the next to go" and that cements the deal!
I've said before that I don't really like the saying "more money than sense" because I feel that everybody should be able to splurge on something they fancy...but in this case I wholeheartedly agree. It is totally not sensible to spend the best part of £300 on something that you know is made from cheap material, you've not been able to examine first hand, let alone try on, and agree to part with £20 just to get it sent to you, in the knowledge that your order is as light as a feather and totally doesn't cost anywhere near that sort of money to send, and furthermore, if you don't like it, you'll have to spend even more money to return it - Yep more money than sense....Crazy!