If you're like me and are scared of wasting big amounts of gold in an item you thought was awsome but then it didn't worth it, you can see the way how it changes your stats, what you have to do is:
- Link it to a friend while you're in the AH
- Create a new game
- Click the link
I know it's common sense, but meybe can be helpful to some people. you dont even have to link it to your friend. you can link it to yourself. exit all chat channels > point mouse and left click over chat area> link item(s) (gives "not a valid chat recipient" msg. > enter game > click on link.