Well.... I don't know where you live that Adafruit shipping starts at $10. I'm in Califormia (so about as far from Adafruit as you can get and still be in the "lower 48") and their lowest cost shipping is about $7.
On the other hand, I managed to order a bare Pi Zero from PiHut last week. That came to 4GBP for the board, plus 4GBP for shipping and the bank will add about $1.25 for currency conversion. That makes it cheaper to get a Pi Zero from the UK than it is from a US retailer. Go figure.
Also...just checked and Pimoroni still has some kits--and not their most expensive kit--listed as in stock from the batch that hit the channel this past week. That's got to be some kind of record for Pi Zero availability if you're desperate enough (or need the other bits) to buy a kit.
It's going to be interesting to see who gets a batch of Pi Zeros this coming week. If it turns out to be MicroCenter...we may never know, but if it Adafruit, we should.