2 Awesome Features OzBargain Could Utilise
Hi,
I recommend OB allows for RSS feeds for specific searches like Samsung Galaxy S3. Also a price graph tracker which tells you the average price at any time for specific popular items. (Galaxy S3 is another good example for this)
Comments

You can see a listing of Galaxy S3 deals here.. As there isn't a price field on the submit page, it may be a bit difficult to create automated graphs of price changes. That said, a price field would be useful.

Adding to what @neil has said, add
/feedto the product/tag URL will get you the RSS feed for that tag, i.e.http://www.ozbargain.com.au/product/samsung-galaxy-s-iii/fee...
Now it's up to all you creative ones to get the pricing info out and do up some charts!
1
What you're looking for sounds more like a price aggregator than what OzBargain does (bargain submissions).
If you want to get prices from all over the place, StaticIce is the place. If you want to index and track them… I don't know that anyone does that at the moment. Are you after the kind of result you'll find from http://camelcamelcamel.com/?
I can certainly see a market for that - if you build it, people will definitely use it. Let me know once your site's up:).
Sorry I can't be more help.