Is $175 unreasonable for this saw even in decent condition? I understand they are about 40 yrs old and about 55cc saws. It has an 18" bar on it as it is but an engine that big should be able to pull 20 or 22" bar. I would also like to give a chisel chain a go and understand that i can't get for my husky 350 with a .325 chain? Would i be able to run a chisel chain on this saw? Thanks in advance.