Thanks for the information, very helpful.  I'm going to try and come up with a low-maintenance/accurate way to get more information in there.

At the moment, I'm using my code to show GPUs in the bitcoin realm.  But, people use GPUs for different reasons and hopefully my site can support that.  As time progresses, I should be able to add other product listings once I get my bearings.

Great idea, I hope to add this once I work out some of the initial kinks.

Thanks for checking it out.  I cleared out some of the bad data for the other countries, and when it comes up I can clear it out now easily.

For whatever reason it is not picking up the 7990 listings.  I will look into this further when I have time.

Do you know a good source to get average wattage for the chipsets?  Again, my only source right now is: https://en.bitcoin.it/wiki/Mining_hardware_comparison.  I'm more of a developer than a bitcoin-er, so I may be using the wrong sources.

Great!  Glad to hear that it is useful, it definitely helps with motivation to update the site.

I added the 7790, but had to guess at the hash rate.  I put in 300, does anyone know what it is?  The better the number the more accurate the calculation as to value.

For better or worse  I'm getting generic hash rates from: https://en.bitcoin.it/wiki/Mining_hardware_comparison

Done, I even used the typical hash rate to calculate price to hash rate.

Now, very easily you can find the best bang for your buck.

Today's update:

* The below image shows "Lowest Price Seen!" feature.  If an item reaches a new low, this message is displayed.
 http://www.gpugarden.com/images/lowest.png

* When prices change, they are tracked and a sparkline is shown with the last ten price changes.  You can mouse over the graph to get pricing details.
 http://www.gpugarden.com/images/sparkline.png

What do people think of today's updates?  Any other ATI chipsets or models people care about?

Click here to view site

Thanks for the kind words.  I updated it to indicate Amazon Prime shipping, and am tracking price changes for a future update.  That way if there is a price drop you would be able to easily tell.

That is good to know, thanks.

That is a good idea, I do see that they do have a price API.  I'll have to look into it further.

I had a hard time price comparing graphics cards on Amazon, so I made this website:

http://www.gpugarden.com/

It pulls used and new prices from Amazon and shows them in a grid.  That way you can easily price compare, and see if there is a good deal on a card.

I can add different chipsets/products if people are interested.

Let me know what you think!  

http://www.gpugarden.com/images/screen.png

Updated June 11, 2013
--------------------------

* Added requested 7790.
* Added Facebook like icon.
* Removed Japanese store (no products)
* Cleared out non-GPU products.
* Put indexes on database tables.

Update June 9, 2013
-----------------------

Today's update will give you better insight into price fluctuations on cards.

* Killer feature.  Typical hash rates are listed, and that is used to calculate hash rate against cost.  You can easily see what the best value is for new and used cards now on Amazon.
http://www.gpugarden.com/images/typical.png

* The below image shows "Lowest Price Seen!" feature.  If an item reaches a new low, this message is displayed.
 http://www.gpugarden.com/images/lowest.png

* When prices change, they are tracked and a sparkline is shown with the last ten price changes.  You can mouse over the graph to get pricing details.
 http://www.gpugarden.com/images/sparkline.png

Update June 7, 2013
-----------------------

* Added icon that indicates Amazon Prime availability
* Tracking price changes, for future update after gathering more data
* Added google+ and twitter buttons

It's not too bad.  I've seen a couple of other forums get totally destroyed by spambots, so this is better than that alternative.

However, the quality of everyone's first five posts is probably pretty low.