The Bluetooth headset gives supposedly 5.5 hours of talk time, and comes in at a price that is really not all that outrages – at $129. While this certainly isn't at the bargain range, most classier bluetooth headsets can easily run $90 and more. The fact that Apple is known for their “coolness premium” makes that pricetag not a surprise at all.
They list a price of $49 for the Dual Dock, which is able to charge the bluetooth headset. Strangely enough, a plain dock that cannot charge the headset costs exactly the same. Other accessories include a USB power adapter, a Dock Connector to USB cable and of course a headset.
As the article mentions, the prices overall are higher than what you see for comparable items for a PDA. However, they aren't “outrageous” or surprising by any means – especially in Apple terms. The prices will, however, give third-parties a huge chance to swoop in and offer “compatible-but-not-quite-Apple” alternatives at much lower prices.