Supply is returning to the market rapidly, if you're interested to source a Pi you should check in with them.
Discussion
Is it a good idea to buy a 1.3 2015 used raspberry pi zero? Or secondhand too big of a risk?
I don't see significant risk with a used 1.3. Of course don't communicate the intended purpose for the board, but I would use a pre-owned 1.3 all day long.