I just got the 3, they are doing good even in my not perfect water parameter tank(is now though). I got them for free with store credit, but they go for $2.40 at the LFS
I had read many things where people had issues with many dying. The ones I got I believe were at the LFS for ~2wks to 1month at least(only 3 they had), so I felt more confident.
I hope you and I have good luck with them, as well as everyone else.
They are nice cute/little/great fish