My stylees are the best things I've bought from QVC...couldn't do without them as I have to wear my hair up for work, and it's quite long and very thick. I find ponytails uncomfortable, and before discovering Stylees I never found anything that kept my hair in place for more than a couple of seconds. I buy them direct from the stylee website now as they have lots of clearance sales.
Other than that my best other shopping channel bought, or inspired products are a memory foam mattress, and foam pillows...and not forgetting my magic bullet blender!
In the early days, I bought two pairs of sandals in last clicks, I think they set me back about £12 for both pairs including p&p, and I wore them for years until they literally wore out! They were a cross between flyflots and birkenstocks, suede uppers and padded impact points on the insoles, and they were the most comfortable sandals I have ever had. All I know is that they were Italian made, and I haven't seen a pair available anywhere since, which is a shame as I'd stockpile them for sure!