OK -- so I finally saw the ad again and clicked on it. I was taken to a simlar, but different URL from that shown in the ad:
Hmmm.... this one looks good -- $205.50 and they take PayPal. I'd be willing to pay that to get an additional Kindle.
But suddenly I find myself at eBay:
And the Kindle *isn't* for sale for $205.50; I'm only offered a chance to BID on the Kindle with a minimum bid of $208.00.
Guys -- this is not the kind of advertising that I would expect at MobileRead. I don't know if there's any mechanism for Alex to provide feedback to Google ads, but I would contend that up until the final web page, there was false advertising in play. (I'd claim a fraudulent ad, but I guess one is never actually defrauded because you haven't spent any money before you find out that the "seller" isn't actually selling the device at the price advertised.)