We had some nice things to say about Sony's newest e-reader back in August, but the $149.99 price tag was a little high. Now, however, the Reader Wi-FI has dropped to $129.99, putting it a solid $10 below the comparable Kindle Touch. Until the end of December, Sony will also credit $50 towards your purchase if you're willing to trade in another e-reader, letting people with older devices get an ad-free upgrade on the cheap.