Greetings good sir, us Angels guild would be most delighted to buy such a box of greenstone dust from you.
Alas, we have been paying only 3500 per box of such, and as a credit from the guild for future purchases most usually. Never fear, I will provide the extra 1500tr for the purchase from mine own pocket.
If credit does not suit you, I will personally purchase this box from you for the total of 5000tr if you allow me.
~Chakar A. El'Mujahir