PSA for Warriors doing their relic quest - dont get ripped off. Buy the EMPTY weapon from the market board plus the 2 materia's. The find a ''materia melder'' NPC in every city and pay 2x 500 gil to meld the both to your weapon.
As of right now on my server, the weapons sell for 13k. The materia for 200 gil. The weapon WITH the 2 materia melded to it already sells for 80k.