if there on the underside of the foliage it could be spider mites
get a spray bottle fill it up with plain water and spray them until they all come off do dis everyday until they disapear
in dublin its usally around 350 an ounce of good but not great herb and about 100 for an ounce of soap and usally its like 200 for an ounce of pollen but i get it for 120.