I did take a course in economics.
Having borrowed one of these things to press reset buttons and remove SIM cards from iPhones, off my son, and then lost it, I thought I would get another. They are very useful and I am amazed that Victorinox don't have one as a standard tool on a pen knife.
So I googled, and Amazon offer them... And just to check I understand this, it is from 19p each but actually for one you pay 50p, for two you pay £11.37, and for three you pay £19.48
OK, I know I failed economics, but I think this one makes no sense to anyone.
So I did a bit more googling, and found someone selling for a more reasonable price, 3p.
Of course, buying something for 3p is a tad crazy, as postage will easily cover a lot more than that, so how does the price break down work on that I wonder...
Seriously, this is 2p at 50 units and 1p at 500 units. I only need one, maybe two so I have one too, but seriously?!
Given lowest postage option was like £4.35 I decided I may as well buy 500, I mean, really, I don't need 500 but, WTF.
It quoted £5 for 500, as you expect, at 1p each. But they it gets complicated.
The actual total for the 500 items was then shown as £7.38 so 1.46p each, hmmm, OK... But the invoice listed them as 2p each so £10 total in the itemisation.
In all, with postage and card surcharge (non EU), I have spent £12.14 which works out 2.42p each. I should have gone for 1000 clearly.
Next question is what I do with 500 pokey things!