In this Act:
"sell" includes—
(a) offer for sale; and
(b) expose for sale; and
(c) barter (or offer or expose for barter); and
(d) exchange (or offer or expose for exchange); and
(e) supply for value (or offer or expose for supply for value); and
(f) supply for free (or offer or expose for supply for free), to gain or maintain custom, or otherwise for commercial gain.