Efficiency

Level 1 of the Dungeon
(0, 0, D:1)
  5 gold pieces

Level 2 of the Dungeon
(0, 0, D:2)
  4 stones
(1, 0, D:2)
  a stone
(3, 0, D:2)
  13 bolts
(3, 3, D:2)
  a stone
(8, -26, D:2)
  a +0 dagger
(8, -24, D:2)
  16 gold pieces
(11, -25, D:2)
  6 gold pieces
(13, -30, D:2)
  16 arrows
(18, -23, D:2)
  a potion of might
(18, -6, D:2)
  7 gold pieces
(32, -7, D:2)
  a frilled lizard corpse (skeletalised by now)
(32, 7, D:2)
  an adder corpse (skeletalised by now)
(38, 5, D:2)
  a +0 robe

Level 3 of the Dungeon
(0, 0, D:3)
  a +0 leather armour (still there?)
  a rat corpse (still there?)
(5, -7, D:3)
  a +0 whip
(5, 6, D:3)
  16 stones
(10, -8, D:3)
  an adder corpse
(13, -10, D:3)
  25 arrows
(13, 4, D:3)
  a scroll of teleportation
(15, 9, D:3)
  a scroll of teleportation
(18, 6, D:3)
  a scroll of blinking

Level 4 of the Dungeon
[Shop] Odyesh's Armour Boutique
  (Shop contents are unknown)
(0, 0, D:4)
  a potion of brilliance
(2, -3, D:4)
  a scroll of remove curse
(3, 18, D:4)
  20 stones