Once you reach level 2 of either the Light Side or Dark Side (1000 points), you can purchase items from the LS/DS vendor on the Fleet. I don’t spend a lot of time on the Fleet, so I often forget about this vendor. It would beneficial to check out the items for sale here once in a while, you may find something fairly useful for your class.
Make sure that you are at the proper level of alignment in order to use these items. For example, you won’t be able to use an item that requires Light III when you are only Light II. You can always check your alignment on your character screen. Hovering your mouse over the alignment gauge will show you what level you are at.