Lots of choices pop up on FleaBay, from $30 for a NIB OEM piston to $150 for a new OEM long block. You just have to ask yourself how much time and money you are willing to throw at a tool that can be bought new at Home Depot for $320.So what is the price for a jug and slug for an Echo CS-400? I was not comparing to cheap China parts. May depend on dealer suport which around here is difficult to find or using "part sharks" online