Quote (gbr_oNi @ May 17 2013 12:36pm)
- Stash any and all currency items (orbs, gemcutter prisms, cartographer's chisels etc. All "currency" items can be seen here, along with their estimate values
http://exilestats.com/ex/)- Look out for ANY green-blue-red
linked items, of any rarity (even if their stats are trash) as these sell for Chromatic Orbs at any vendor (list of special vendor "recipes" here
http://en.pathofexilewiki.com/wiki/Vendor_Recipes)- Don't be ashamed of mass hoarding rares/gems etc until a point at which you understand values better.
Hope this helps

just clearing it up, exilestats' chart doesn't list ALL of the currency items (since some are so cheap, or in mirror's case so expensive), though it is a good source for approximating value
an actual full list can be found here
http://www.pathofexile.com/item-data/currency