Hello, i found some nice gold trick to do with your JC.
1. Check the prices for eternal/crystalized earth and shadow.
2. Check the prices for WotLK green gems like chalcedony, bloodstone etc.
You are going to craft and vendor WotLK lowbie rings that requires 2x Crystallized earths/shadows +1 green gem. On my realm, eternal earths costs 3g and sun crystal costs 1g so with 8 g i can craft and vendor 5 rings which sells for 3,14g/each in total of 15,7g. Money makes money :] Enjoy.