If I were to exchange a non-top D grade weapon for a top C grade, would the new top C from Mammon retain it's OE's? I am aware that it wont keep it's SA and that I have to pay AA.
Ex.: D grade(+10) + 2.2AA = Top C(+10)....Is that correct?
Edit: Does this apply if going from any weapon with OE's to another weapon (+AA if necessary)?
The only way to keep enchants is to do an even exchange.
PS - Actually, a weapon exchanged with mammon will "keep it's SA." If it has an SA on it, Mammon doesn't "see" it. You can't trade it, you have to take the SA off at the Black Market mammon guy.
Blacksmith (the weapon trader/SA guy) can be found at catacombs and the trader at necropolises (they port around). Usually you can find out where they are by watching hero shout.
You have to sign up for the competition, swim down the "pool" of a cata or necro, into the cave and run up the ramp until you come across a gatekeeper ziggurat. Click teleport.
**Edit - You have to sign up for the 7 signs competition before it ends and your side (dawn or dusk) has to win in order to gain access to mammon.