Thank God for my Stihl dealer. I just bought a 10 mm piston 4 $60 noticed on eBay they were 95Likewise for my country, shipping costs and parts are exorbitantly expensive and sometimes parts are cheaper from China, would I put OEM parts on a saw?, every single time but the costs to do so generally are prohibitively expensive, my local Stihl dealer wanted to charge me $50USD for two seals for a Stihl 044.