Just a brief follow-up to this morning’s post in which I discussed the interesting challenge, for Amazon, of managing the comings and goings of various Kindle models.

Throughout most of this year, Amazon was selling new units of just two Kindle models: the Kindle 2 and the Kindle DX. For over two years the 6-inch Kindle has been the #1 bestselling item in the Kindle Store across all categories. But for the first six months of 2010, the Kindle DX at its $489 price languished far back, drifting in the #5-6-7 range in the electronics category. Amazon is an authorized seller for Apple’s iPod Touch and various other Apple products, and the Kindle DX routinely trailed several iPad Touch models in sales though most of its life.

Now, with the recent reduction of the US price for the Kindle DX from $489 to $379 and the launch of, in effect, four new 6-inch Kindle 3 models, Amazon’s electronics bestseller list presents a dramatically different story. As shown in the screenshot below, the top four items among Amazon’s electronics bestsellers are Kindles, and no longer are there any iPod Touch models outselling the DX on the Amazon website:

It’s a different picture for UK Amazon customers, since the DX is currently unavailable in the the UK.