For defeating the sentries on the trade level and negotiating successfully with the Archmage Solom Ned'Rezak you each receive 8,800 experience points.
2 Szith Morcane Sentry 2: Mithral Breastplate, +1 Glaive, Mwk. Short sword, hand crossbow, 20 bolts, potion of bull's strength, 1 dose of drow poison
2 sentry 3's each had: +1 chain shirt, masterwork shortsword, +1 composite longbow (+2 str bonus), cloak of elvenkind, 1 dose of drow poison
1 spellguard: Rapier, hand crossbow, 20 bolts, wand of lightning bolt (25 charges), arcane scrolls of ray of enfeeblement, spider climb, 250gp of diamond dust, gold ring worth 20 gp