Why do I even try to explain this... well let's give it a shot.
Most manufacturers have several 'tiers' of products.
The best
The really good
The run of the mill.
The ok.
then some even go as far as
The mediocre
The cheapo
The walmart.
If I am selling a BMW.... which basically made it's 'name' with absolute quality, I am not going to entertain a 'walmart bmw' cheaper, crappier because that would dilute my 'bmw' name. Some places will NOT sacrifice quality for the sake of a sale. On that, yes I know there are 'tiers' as well in the Beemer world, but most of it is not necessarily quality, but goodies / power / bells and whistles type stuff.
Other companies now have many tiers of products including the cheap crap. Look at hard drives.... the green labels are the slow crap you use for big files,not very expensive, not very fast, not very big buffer, use them for archiving... the black is better... the xxx is the high performance... as an example.
I may sell my green for 100 bucks.... walmart may say, hey, if we buy 1 million of them, and want to sell them for 95 or 90, what we do to 'make them doable' at that price. I say well we can drop the buffer a bit or not put them in the shrink sealed wrap, they are plain jane... or whatever.... we will call it the green95W model instead of the green 95model to show those slight differences. It's already a lower end model... the green. Now I am not going to let them cheapen my black or top of the line model because that performance that is essentially guaranteed when people buy 'black' or 'caviar' or whatever I am not going to sacrifice, THAT is my reputation there.
You are not going to see wallmart selling cheap Rolex watches, you might see them selling cheaper timex watches.
Aaron