The Zero is advertised as being $5, and it makes me angry every time, because it's not possible to buy it at that price.
Every Pi retailer either has a one-per-customer limit, and charges shipping, or, charges up to $15(!) per Zero if you buy more than one.
So it's essentially a $15 device being advertised as $5. I shouldn't be so annoyed about it, but I can think of so many cool uses for multiple Zeros, and I just can't get them.