someone please help?!

My biggest question is, Where do I get items that normally you can only get from finishing quests, such as-

Ghostly Robes
Hazeels Mark
Silverlight
Dragon Longsword
Helm of Neit
Ancient staff
Elemental Shield
Crystal Bow
God Books (and the pages)
Etc

If you have the answers to the above id like to hear them, or more, sense most of the times when I am online, I have nobody to ask. So this information would be a great help!!