[jerryji]

I think I understand what pricenomics does, which you can find similar information (actually more transparent and detailed) on Bizspeaking -- http://bizspeaking.com/item/c2145006f10a4b06ba71856e49e06e02 , then on top of that, Bizspeaking does a whole lot more. (The site is a bit slow now, there seems to be some Redis issue that I'm trying to resolve).

[avree]

The whole lot more is sometimes the problem. Pricenomics does one thing well.

On your site, the main call to action is to post something I've bought. Why would I want to do that? I also couldn't actually figure out how to search for an item (I entered "Macbook Pro" into the filter but didn't find what I was looking for.)

[jerryji]

Thank you for your valuable feedback, the search is actually at the top right corner, which I thought is the web convention, but will make it more prominent now. And you are right that the full-text search requires more tweaking.