Here it appears that a case (36pc) of size Large direct from Rearz.ca is $95 plus $20 shipping. That's $3.20(US)/pc.
Of course if you're not buying by the case, prepare to pay a much higher price. That's how it's always going to be.
I think a 1-2 sample order is a huge waste of money. I recommend getting a bag when sampling diapers. (odds are good you're going to need several tries anyway to work out the best tape placement and to evaluate performance of a diaper you haven't tried before)
(and if you don't need pink.... the inspire/incontrol are the same exact diaper with a plain white shell for a lower price, good to get if you are focusing on fit and performance for your sampling)