Go to amazon.com for the price on a kindle. There are some on ebay as well. US$399 on Amazon and anything from US$375 on ebay. WSJ, I have no idea of the Kindle subscription price.
I bought mine from Amazon- $399. The price is steep but it is a truly revolutionary e-reader with the ability to download books directly wirelessly. I love my kindle. We visit the DR 3-4 times a year and half the weight of my suitcase is books to read while on vacation. Now I can put them all on the kindle and if I run out of books I can download more.