2 grey and blues, 2 yellow and white are weaning, starting to clim on cage, learn to perch and propably fist flying soon. As young birs they are easy to be scared at first, Goggle/Youtube for how to tam eyour baby birds!
https://petshun.com/article/how-hold-do-parakeets-have-to-be-to-be-weaned
Each for $25. https://www.petsmart.com/bird/live-birds pet smart has $44.99 / each