I have a listing for x pairs of earrings, mixed colors (my choice) for $X.
Volume discounts could always be listed as variations of this
So if it were earrings, it could be pack of 10 = $75, pack of 20 $140, pack of 40 $260 etc. At least since we don't pay for listings on Wholesale, it does give us some flexibility.
Since they are wholesale only listings, they aren't seen in the retail store.