I think hes referring to the mark up on products. A vial of test diesnt cost much to manufacture. Some labs charge certain amounts for their products based on essentially whatever they want. Risk. Chemist cost. Raw cost. Etc. Who knows really on how its determined. To each their own.
Plus dont forget third part resellers. Some people rep for reps so to speak so the price tag can be even higher.
Many factors go into it. But essentially just because a lab charges 30$ compared to 55$ for a vial of test doesnt mean one is of less quality than the other.