Vendor

These are the items that can be bought and sold, depending on your reputation with the vendor, condition of the item, and your diplomacy prices will vary.

Also each item will have a availability to determine how rare that item is:

Common

Uncommon

Rare

Extremely Rare

Weapons:
Pistols

Energy Pistols
Energy Weapons use Half INT instead of Dex to Hit

Energy Rifles
Energy Weapons use Half INT instead of Dex to Hit