What is the value of a 22 cent waltzing Matilda series postage stamp Australia?

According to the current catalogue, a mint never-hinged (MNH) 22 cent Australia Waltzing Matilda postage stamp from 1973-1983 is valued at $1.00 while a used ($0.50) example. An average mint hinged (MH) example is worth about $0.75.