Looks like Blaz & I will lock horns on this one.
Down here we get a lot of really cheap Chineese made blades that "LOOK EXACTLY LIKE THE FACTORY ONES"
However that is where the similarity ends, they look the same,
Some are made from plain low carbon steel so bend , twist and do not hold an edge , othere are case hardened so vanish once they are sharpened while others still are made from high carbon steel and are sharp & hard, way too hard and have been known to shatter when they hit a rock, root etc.
Apart from a waste of money, who do you sue when a lump of flying blade strikes some thing or some one ?
A non entity on evilbay that will vanish without trace overnight ?
Will your insurance cover you when you have fitted cheap non certified blades to save a few $$$ ?
Factory blades are generally higer priced because they are better and have guarantees and product liability insurance.
In many cases they end up being cheaper because they last longer.
However if you are poverty struck and can not afford the few dollars more any of the aftermarket parts supliers can supply you with aftermarket blades that also have product liability insurance.
Oregon , Stens & Rotary all do aftermarket blades and many of the companies that pay for this site stock them like Jacks for instance.
Oregon have a web site that list stockists as do Stens don't know about Rotary I get their blades through one of my wholesalers who again carries product liability insurance.
And just because a blade pictured on evilbay has the name of a well known maker on them does not guarantee they are in fact bona fide " Ah what name you want me put on blade"
There are more fake Oregon chain saw bars on the web than Oregon make in a year and you even see them on fake Stihl chansaws becaues the forger does not know Stihl fit their own bars.