Made something similar just tracking products in Argentina, where I'm from, pretty much the same concept but I don't understand why don't you put a big nice button with an affiliate link to buy the best price listing you found for today, that would help, believe me :)

This is my version: http://numok.com

PS, the guys from priceonomics.com seems to be the leaders in this.

I really like your design (:

And yes, I'll be changing design and button placement in the coming weeks, that's a valid point.

Awesome job! I would definitely use this - but I'm getting a 500 error trying to enter my email address with plus character in it.

Oh so you are the lonely, malformed entry in my db... I'll fix that, sorry!

Should work now, sorry for the inconvenience.

Would be neat to see the items in a category which have had the sharpest price drop recently.

That is coming. But first of all, I need to implement a working category system :/

Thank you (: