Selling/Buying
 

Selling
3 Prepare Weapon scrolls (5 diamonds each)
Immense Treasure Map (3 diamonds)
Enchant Weapon Scroll (5 diamonds)
Improve Weapon Damage (5 diamonds)
Havocks Gloves +12 (80 diamonds)
Ring of Combat (30 diamonds)

I also accept platinum coins in substitution for diamonds.
500 platinum coins = 1 diamond

Buying
Scroll of Piety

I will be on Graal Kingdoms or Zone, try to catch me in game if possible.

I'll sell you a scroll of literacy. I'll look for you in game.

Prepare weapons are now 3 diamonds each, Havocks Gloves +12 are now 60 diamonds and Ring of Combat (RoC) is 25 diamonds.

I would've said you broke this rule, but you were correcting yourself:

6.) Don't argue over prices set by the seller. If the price is too steep or shallow, make a point of it, but don't attack someone for it.

XD

Also selling
Lucky boots +12 (60 diamonds)
Cowboy Hat +12 (95 diamonds)