All these Epic And Expensive Items Must Come From Somwhere.But Where??!! (To Be Updated)

I keep seeing all these people selling items on World Chat and i ask myself, they must of gotten these items somewhere, but where?!?!

Here Are All The Items i Have Found (Only Epics)

-Reverse Edge Sword B 

Price Range: 550gc to 1000gc

Found: Lv45 Kung Fu Gold Chest

-Doom Sword

Price Range: 30gc-60gc

Found:Lv45 Kung Fu Gold Chest

-Permanent Refresher

Price Range: 900gc-1500gc

Found:Lv45 Kung Fu Gold Chest

-Moon's Secret Spaulder 

Price Range: 1700gc-2000gc

Found: Lv55 Gold Chest

-Gold Wing Shoes
Price Range: 400-600gc
Found: Lv55 Chest (No Key)

-Permanent Refresher
Price Range: 3000-4000gc
Found: Lv45 Kung Fu Gold Chest