not allowed anymore to order just 2, 4, 5 vials instead of a full kit? i would only "test" some peps but obviously i can't order one kit for every substance, just to use a single vial.
i hope you can do some offers like 5+5 vials or 2+2+2+2 vials, with little overprice on 5 or 2 vials, but allowing some potential customers to test how they respond to the substance, and then buy full kit.
example if 1 kit is 60, one vial is 6. 5 vials should be 30 but with little overprice (20%?) pay 36, + other 5 vials ...same 20% more for that 5 and so on, and if one add only ONE VIAL (6 each example) apply 40% price more, so 6/100*140= 8.4 usd per vial instead of the 60/10= 6usd price