Thing is, over here in the wee Island Nations (you live on our West Island), we are not tripping over broken, wrecked, fixer upper, older chainsaw powerheads, nor can we pop in to one of a dozen Stihl or Husqvarna agents to see what they have in the scrap bin.
We live in areas of fairly low populations of saw users and both live in countries where most anyone capable of using a saw was bought up using one, knows what they are doing with one, knows they cost them an arm and a leg to buy new here and so knows how to maintain and repair them themselves, not just drop them to the shop only to hear "sorry, uneconomic to repair", so drop a few hundred on the shop counter for a new one.