Probably not as rare as it is here. Most US guys never even heard of the Mk1, Mk2 or Mk3. The quality dropped off after the Mk2. Later Marks means more plastic and some odd stock style from Mk 3 to about 6. Airsporter Stutzens are attractive guns. Mk1, 2, and maybe3 in .22 have 5.6mm barrels.