As Executioner's calling is one of those particular items with a good story behind it, we could really bump up the price without boosting too far its already existing attributes (as little as possible) by using the BFsword and Avarice Blade as the components. After all, Executioner's calling is supposed to be a B F long sword (look up what BF sword means).
Executioner's Calling (2950). Legendary due to Avarice Blade.
Recipe: 600
Components
Avarice Blade (800)
B. F. Sword (1550)
Total before recipe: 2350
+45 Attack Damage, +15% critical strike, Unique Passive: +20% Spell Vampirism, Unique Passive - Executioner's Mark: Your basic attacks apply Executioner's Mark to the target for 8 seconds dealing 5 magic damage per second and applying Grievous Wounds to the target.
(Grievous Wounds reduces healing and regeneration effects by 50%).
The Mark isn't some OP early game thing for champions like darius to stack on their already insane earlygame DoT, because the item is so expensive now. However, if the early game Grievous Wounds is still desired, it could go about a different route; an extra step, making a Legendary but advanced-like item (similar to Bilgewater Cutlass) another middle man. This will keep the Executioner's Calling Long Sword still in its right place at the top.
Glut Long Sword (1400). Legendary due to Avarice Blade.
Recipe: 200
Components
Avarice Blade (800)
Long sword (400)
Total before recipe: 1200
+12% Critical Strike Chance, +15 Attack Damage, UNIQUE Passive: Basic attacks apply Grievous Wounds to the target.
(Grievous Wounds reduces healing and regeneration effects by 50%).
Executioner's Calling (2950). Legendary due to Glut Long Sword.
Recipe: 675
Components
Glut Long Sword (1400)
Pickaxe (875)
Total before recipe: 2275
+45 Attack Damage, +15% critical strike, Unique Passive: +20% Spell Vampirism, Unique Passive - Executioner's Mark: Your basic attacks apply Executioner's Mark to the target for 8 seconds dealing 5 magic damage per second and applying Grievous Wounds to the target.
(Grievous Wounds reduces healing and regeneration effects by 50%).