All depends on the shop, and if it's local versus online. Should be able to pick up a little frag of Stylophora for $30-40 or so from a LFS
. Maybe less depending on if it's a commercially raised one versus something another customer brought in for credit. Turbinaria will really vary depending on the species and the colors. Think I paid something like $70 or $80 for mine (less shipping) from LiveAquaria when I bought it.
Here is was then (18 months ago):
Here it is now - the "flat" part in the bottom of the "cup" is the original colony: