Didnt search this but it still works on my server (priv).
Step 1. Buy an items which is only 1 allowed in inventory (when you try to buy more itll say something like you cannot carry anymore of these items)
Step 2. Equip , Disequip , Sell it.
Step 3. Buy a new one equip it.
Step 4. Start spamming rebuy in the shop.
Step 5. HARDEST part the server must crash. Maybe in an accident crash. Or ask your friends to make a 4v4 party or what its called. One way or the other it must crash.
Step 6. After the crash relog as soon as possible then a reroll you have 2 items in inv (the same which dosent let you have 2) or 1 equipped other in inv.
Step 7. may be hard equip the one or two in your inv