Improved price check
Amazon price links have been on shelf listings for a while now. They look like:
When you click “Price”, it queries for a current price from Amazon. Until now, this price was sort of dumb, because it was the “lowest new” price offered by anyone selling on Amazon. But who buys from those people? We all buy from Amazon if we can, because it ships faster, works with Amazon Prime, and is probably better supported if you have a problem.
Well now, the price returned is in fact Amazon’s own price, finally!
At the same time, I also added such links to the single-item page, and to the Amazon search results page. In fact, for Amazon search results, I go ahead and get the price at query time and just put it in there directly.