I have extracted the world export-import data of certain commodity codes like 530310,531010,531090 etc. I am searching for the world export/import prices of the commodities. is it available in this site? otherwise plz suggest me any other site from where I can get these price data.

You can try the FAO (Food and Agriculture Organization) or UNCTAD websites.  We do not have prices for commodities.

http://faostat.fao.org/site/351/default.aspx

http://www.unctad.org/templates/Page.asp?intItemID=1889&lang=1