First push

AvgItemLvl.toc

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+## Interface: 100005
+## Title: AvgItemLvl
+## Author: ThundurTwonk
+## Version: v1.0.0
+
+main.lua

Bindings.xml

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+<Bindings>
+    <Binding name="INSPECT_TARGET" header="AVG_ITEM_LVL" category="ADDONS">
+        InspectUnit("target")
+    </Binding>
+</Bindings>

main.lua

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+_G["BINDING_HEADER_AVG_ITEM_LVL"] = "AvgItemLvl"
+_G["BINDING_NAME_INSPECT_TARGET"] = "Inspect Target"
+local alreadyInitialized = false
+local InspectFontStrings = {}
+
+local function initialize()
+    if InspectModelFrame == nil then
+        return
+    end
+
+    InspectFontStrings["avg"] = InspectModelFrame:CreateFontString(nil, "OVERLAY")
+    InspectFontStrings["avg"]:SetPoint("TOPRIGHT", -5, -5)
+    InspectFontStrings["avg"]:SetFont("Fonts\\FRIZQT__.ttf", 24, "OUTLINE")
+    InspectFontStrings["avg"]:SetTextColor(0, 1, 0)
+
+    alreadyInitialized = true
+end
+
+local function updateText()
+    if InspectModelFrame == nil then
+        return
+    end
+
+    local avgilvl = C_PaperDollInfo.GetInspectItemLevel("target")
+    InspectFontStrings["avg"]:SetText(avgilvl)
+    InspectFontStrings["avg"]:SetTextColor(255, 255, 0)
+end
+
+local function main()
+    if CanInspect("target") then
+        if not (alreadyInitialized) then
+            initialize()
+        end
+        updateText()
+    end
+end
+local inspectEventHandler = CreateFrame("Frame", nil, UIParent)
+inspectEventHandler:RegisterEvent("INSPECT_READY")
+inspectEventHandler:SetScript("OnEvent", main)