this will be the first 5 fragment common item(i think!).. let's see how this hurts the business of the lower levels.
I don't come on the forums very often, and while not speaking for everyone, I'm sure this statement applies to a some players.
I don't buy common items, or any other type of item from lower players for the purpose of fragmenting. when my supply runs low, I venture to an area with a large FI to gain what items I require.
The fact BG has placed a single item at 1876, I don't think this will affect business of the lower levels, being that those that farm now will still sell in the AH, whether that be a high level player farming a 910+ area or a 900 level player farming the same area. Those of us who don't farm to sell have the chance to stock up as we level.
If your statement is targeting the AH and a higher level farmer placing these common items in the AH to compete with you directly, then you've always had competition with the AH with other sellers of common items, each of you battling with the re-sale value to make it more attractive to buy and under cutting your competitors, this is the exact same principal for the potion / LE item recipe makers.
To take terminology associated with the stock market, it could be a "bull market" - google it!