Of course there is one advertiser on this site that sells the China stuff and I won't go there, not even for his saw chains. He also lists on Flea-Bay FYI and Amazon FYI. I have never purchased anything from him and don't plan to either. I may be buying his China carbs and not knowing it.
Like I said I have bought the China carbs but I buy 2 at a time and hope one will work and so far that has panned out, They are so cheap I don't mind tossing the non functioning one.
One thing I notice about the China carbs is the quality of the castings is very poor.
Far as chains go, I buy them in bulk rolls and make my own loops up as needed and always Oregon brand. Have not bought any in a long time as I have plenty.
Gas is always Red Armor 50-1 canned or Tru-Fuel 50-1 and I don't use a lot anyway. One thing I do, do is I run the corn squeezed gas out of my 4 stroke power equipment and add about a quarter tank of canned fuel to them and run that in them for a few minutes and shut them off and let them sit all winter and so far I've had no issue when I start them in the spring and put them back on corn squeezed gas.
You cannot buy straight (no oil added) Red Armor but you can buy Tru-Fuel with no oil added so that is what I add to my over wintering power equipment.