I bought a Pi Zero last week from The Pi Hut, arrived in two days, they had loads in stock. Might be a problem with your local distributor? I'm in the UK so supply may well be better here than elsewhere.
I did get tripped up with the camera connector being a different size to normal Pis though, darn it.
[1] www.thepihut.com (I am not affiliated with them in any way)
Yes, it's £9.60 for the RPi Zero W and £2.50 for shipping. You can buy it for £12.10 ($15) total in the UK. Not too bad, eh?
Shipping to Germany from the same UK seller would be £4, or £5 for the US. That's a total of £13.60 / €16 / $17 for Germany and £14.60 / $18 for the US.
On Pimoroni, shipping to Switzerland is also around £4. In contrast, the official distributor for Germany/Switzerland (pi3g) wants 19€ (!!!) for shipping an envelope with a single Pi Zero in it. And it prohibits reselling. In my opinion the Raspberry Pi foundation should do something against this kind of pricing to keep the boards accessible.
I did get tripped up with the camera connector being a different size to normal Pis though, darn it.
[1] www.thepihut.com (I am not affiliated with them in any way)