The Penny Black Although the Penny Black is readily available on the collectors’ market today, because of its significance, it is in great demand by collectors and therefore not cheap; in 2000 a used stamp cost about US$200 (around ÂŁ110), and an unused stamp about US$3,000 (around ÂŁ1,600). (By contrast, a used penny red was $3 (ÂŁ1.50).)