diff --git a/Core.lua b/Core.lua
index 59dbee7..94ecf8a 100644
--- a/Core.lua
+++ b/Core.lua
@@ -269,9 +269,9 @@ end
 ]]
 
 local function SourceLocation(parent)
-    local parentName = parent:GetName()
-    local parentParentName = nil
-    local parentParentParentName = nil
+    local parentName = parent:GetName()
+    local parentParentName = nil
+    local parentParentParentName = nil
 
     if parent:GetParent() and parent:GetParent():GetName() then
         parentParentName = parent:GetParent():GetName()
@@ -285,11 +285,13 @@ local function SourceLocation(parent)
     local bagIndex = parent:GetParent():GetID()
     local slotIndex = parent:GetID()
     local forceBankScope = false
-
-    local locationBagIndex, locationSlotIndex = nil, nil
-    if parent and parent:GetItemLocation() and parent:GetItemLocation():GetBagAndSlot() then
-        locationBagIndex, locationSlotIndex = parent:GetItemLocation():GetBagAndSlot()
-    end
+    local hasItemLocation = false
+
+    local locationBagIndex, locationSlotIndex = nil, nil
+    if parent and parent:GetItemLocation() and parent:GetItemLocation():GetBagAndSlot() then
+        locationBagIndex, locationSlotIndex = parent:GetItemLocation():GetBagAndSlot()
+        hasItemLocation = locationBagIndex ~= nil and locationSlotIndex ~= nil
+    end
 
     ns.printParentNames(parent)
 
@@ -357,31 +359,48 @@ local function SourceLocation(parent)
         slotIndex = parent:GetContainerSlotID()
     end
 
-    return isGuildBank, bagIndex, slotIndex, forceBankScope
+    return isGuildBank, bagIndex, slotIndex, forceBankScope, hasItemLocation
 end
 
 -- Overrides standard function for split dialog
 
-local function OpenFrame(self, maxStack, parent, anchor, anchorTo, stackCount)
-
-    ClearDialog()
-    dialog = CreateItemSplitterDialog(maxStack)
-    dialog:ClearAllPoints()
-    dialog:SetPoint(anchor, parent, anchorTo, 0, 0)
+local function OpenFrame(self, maxStack, parent, anchor, anchorTo, stackCount)
+
+    ClearDialog()
+    dialog = CreateItemSplitterDialog(maxStack)
+    dialog:ClearAllPoints()
+    dialog:SetPoint(anchor, parent, anchorTo, 0, 0)
     dialog.editBox:SetScript("OnEditFocusGained", function(self)
         C_Timer.After(0.1, function()
             self:HighlightText()
         end)
     end)
-    dialog.editBox:SetFocus()
-
-    local isGuildBank, bagIndex, slotIndex, forceBankScope = SourceLocation(parent)
-
-    dialog.splitButton:SetScript("OnClick", function()
-        parent.SplitStack(parent, dialog:GetValue()) -- original behaviour
-        ClearDialog()
-    end)
-
+    dialog.editBox:SetFocus()
+
+    local isGuildBank, bagIndex, slotIndex, forceBankScope, hasItemLocation = SourceLocation(parent)
+    local isMerchant = MerchantFrame and MerchantFrame:IsVisible()
+
+    if isMerchant then
+        dialog.autoSplitButton:Hide()
+        dialog.splitButton:ClearAllPoints()
+        dialog.splitButton:SetPoint("BOTTOM", dialog, "BOTTOM", 0, 10)
+        if hasItemLocation then
+            dialog.splitButton:SetText("Sell")
+        else
+            dialog.splitButton:SetText("Buy")
+        end
+    end
+
+    dialog.splitButton:SetScript("OnClick", function()
+        local splitValue = dialog:GetValue()
+        if self and type(self.split) == "function" then
+            self.split(splitValue)
+        else
+            parent.SplitStack(parent, splitValue) -- original behaviour
+        end
+        ClearDialog()
+    end)
+
     dialog.autoSplitButton:SetScript("OnClick", function ()
         DisableDialog()
         StartAutomaticSplitSession(isGuildBank, bagIndex, slotIndex, dialog:GetValue(), forceBankScope)