Omg, I have seen this too. Yeah, I don't think so! Or, when you find something for a reasonable price on Amazon, but it is shipping from the US, so they want an extra £30 to ship! WRONG.
What I hate is when you go in an American store and they want like £5 for a box of reese's pieces and I want to say, you know you can get those at Poundland, right? Guess how much they are?!