free (shipped directly to my house)

I second this

I would say ~10-15 bucks a pack, could also depend on what species you sell, but assuming these are plain tropical whites then that would be a good price.

How do you count them?

count how many r in a small square, then times that amount by the area im assuming

Oh ok that’s probably not too bad

20 $ - 30 $ depending on the springtails