diff --git a/ArchiSteamFarm.OfficialPlugins.ItemsMatcher/Backend.cs b/ArchiSteamFarm.OfficialPlugins.ItemsMatcher/Backend.cs
index c3fdab643..00f904aa2 100644
--- a/ArchiSteamFarm.OfficialPlugins.ItemsMatcher/Backend.cs
+++ b/ArchiSteamFarm.OfficialPlugins.ItemsMatcher/Backend.cs
@@ -38,7 +38,7 @@ using SteamKit2;
 namespace ArchiSteamFarm.OfficialPlugins.ItemsMatcher;
 
 internal static class Backend {
-	internal static async Task<BasicResponse?> AnnounceForListing(ulong steamID, WebBrowser webBrowser, IReadOnlyCollection<AssetForListing> inventory, IReadOnlyCollection<Asset.EType> acceptedMatchableTypes, uint totalInventoryCount, bool matchEverything, string tradeToken, string? nickname = null, string? avatarHash = null) {
+	internal static async Task<BasicResponse?> AnnounceForListing(ulong steamID, WebBrowser webBrowser, IReadOnlyList<AssetForListing> inventory, IReadOnlyCollection<Asset.EType> acceptedMatchableTypes, uint totalInventoryCount, bool matchEverything, string tradeToken, string? nickname = null, string? avatarHash = null) {
 		if ((steamID == 0) || !new SteamID(steamID).IsIndividualAccount) {
 			throw new ArgumentOutOfRangeException(nameof(steamID));
 		}
@@ -65,7 +65,7 @@ internal static class Backend {
 			throw new ArgumentOutOfRangeException(nameof(tradeToken));
 		}
 
-		Uri request = new(ArchiNet.URL, "/Api/Listing/Announce/v2");
+		Uri request = new(ArchiNet.URL, "/Api/Listing/Announce/v3");
 
 		AnnouncementRequest data = new(ASF.GlobalDatabase?.Identifier ?? Guid.NewGuid(), steamID, tradeToken, inventory, acceptedMatchableTypes, totalInventoryCount, matchEverything, ASF.GlobalConfig?.MaxTradeHoldDuration ?? GlobalConfig.DefaultMaxTradeHoldDuration, nickname, avatarHash);
 
diff --git a/ArchiSteamFarm.OfficialPlugins.ItemsMatcher/Data/AnnouncementRequest.cs b/ArchiSteamFarm.OfficialPlugins.ItemsMatcher/Data/AnnouncementRequest.cs
index b18df966c..d5592c8df 100644
--- a/ArchiSteamFarm.OfficialPlugins.ItemsMatcher/Data/AnnouncementRequest.cs
+++ b/ArchiSteamFarm.OfficialPlugins.ItemsMatcher/Data/AnnouncementRequest.cs
@@ -38,7 +38,7 @@ internal sealed class AnnouncementRequest {
 	private readonly Guid Guid;
 
 	[JsonProperty(Required = Required.Always)]
-	private readonly ImmutableHashSet<AssetForListing> Inventory;
+	private readonly ImmutableList<AssetForListing> Inventory;
 
 	[JsonProperty(Required = Required.Always)]
 	private readonly ImmutableHashSet<Asset.EType> MatchableTypes;
@@ -61,7 +61,7 @@ internal sealed class AnnouncementRequest {
 	[JsonProperty(Required = Required.Always)]
 	private readonly string TradeToken;
 
-	internal AnnouncementRequest(Guid guid, ulong steamID, string tradeToken, IReadOnlyCollection<AssetForListing> inventory, IReadOnlyCollection<Asset.EType> matchableTypes, uint totalInventoryCount, bool matchEverything, byte maxTradeHoldDuration, string? nickname = null, string? avatarHash = null) {
+	internal AnnouncementRequest(Guid guid, ulong steamID, string tradeToken, IReadOnlyList<AssetForListing> inventory, IReadOnlyCollection<Asset.EType> matchableTypes, uint totalInventoryCount, bool matchEverything, byte maxTradeHoldDuration, string? nickname = null, string? avatarHash = null) {
 		if (guid == Guid.Empty) {
 			throw new ArgumentOutOfRangeException(nameof(guid));
 		}
@@ -93,7 +93,7 @@ internal sealed class AnnouncementRequest {
 		Guid = guid;
 		SteamID = steamID;
 		TradeToken = tradeToken;
-		Inventory = inventory.ToImmutableHashSet();
+		Inventory = inventory.ToImmutableList();
 		MatchableTypes = matchableTypes.ToImmutableHashSet();
 		MatchEverything = matchEverything;
 		MaxTradeHoldDuration = maxTradeHoldDuration;
diff --git a/ArchiSteamFarm.OfficialPlugins.ItemsMatcher/Data/AssetForListing.cs b/ArchiSteamFarm.OfficialPlugins.ItemsMatcher/Data/AssetForListing.cs
index 4cf0ed74f..08826ba6d 100644
--- a/ArchiSteamFarm.OfficialPlugins.ItemsMatcher/Data/AssetForListing.cs
+++ b/ArchiSteamFarm.OfficialPlugins.ItemsMatcher/Data/AssetForListing.cs
@@ -26,16 +26,12 @@ using Newtonsoft.Json;
 namespace ArchiSteamFarm.OfficialPlugins.ItemsMatcher.Data;
 
 internal sealed class AssetForListing : AssetInInventory {
-	[JsonProperty("i", Required = Required.Always)]
-	internal readonly uint Index;
-
 	[JsonProperty("l", Required = Required.Always)]
 	internal readonly ulong PreviousAssetID;
 
-	internal AssetForListing(Asset asset, uint index, ulong previousAssetID) : base(asset) {
+	internal AssetForListing(Asset asset, ulong previousAssetID) : base(asset) {
 		ArgumentNullException.ThrowIfNull(asset);
 
-		Index = index;
 		PreviousAssetID = previousAssetID;
 	}
 }
diff --git a/ArchiSteamFarm.OfficialPlugins.ItemsMatcher/RemoteCommunication.cs b/ArchiSteamFarm.OfficialPlugins.ItemsMatcher/RemoteCommunication.cs
index 5f552f561..e8a173314 100644
--- a/ArchiSteamFarm.OfficialPlugins.ItemsMatcher/RemoteCommunication.cs
+++ b/ArchiSteamFarm.OfficialPlugins.ItemsMatcher/RemoteCommunication.cs
@@ -238,10 +238,9 @@ internal sealed class RemoteCommunication : IAsyncDisposable, IDisposable {
 
 			bool matchEverything = Bot.BotConfig.TradingPreferences.HasFlag(BotConfig.ETradingPreferences.MatchEverything);
 
-			uint index = 0;
 			ulong previousAssetID = 0;
 
-			HashSet<AssetForListing> assetsForListing = new();
+			List<AssetForListing> assetsForListing = new();
 
 			Dictionary<(uint RealAppID, Asset.EType Type, Asset.ERarity Rarity), bool> tradableSets = new();
 
@@ -249,7 +248,7 @@ internal sealed class RemoteCommunication : IAsyncDisposable, IDisposable {
 				if (acceptedMatchableTypes.Contains(item.Type)) {
 					// Only tradable assets matter for MatchEverything bots
 					if (!matchEverything || item.Tradable) {
-						assetsForListing.Add(new AssetForListing(item, index++, previousAssetID));
+						assetsForListing.Add(new AssetForListing(item, previousAssetID));
 					}
 
 					// But even for Fair bots, we should track and skip sets where we don't have any item to trade with
@@ -279,7 +278,7 @@ internal sealed class RemoteCommunication : IAsyncDisposable, IDisposable {
 
 			// We can now skip sets where we don't have any item to trade with, MatchEverything bots are already filtered to tradable only
 			if (!matchEverything) {
-				assetsForListing.RemoveWhere(item => tradableSets.TryGetValue((item.RealAppID, item.Type, item.Rarity), out bool tradable) && !tradable);
+				assetsForListing.RemoveAll(item => tradableSets.TryGetValue((item.RealAppID, item.Type, item.Rarity), out bool tradable) && !tradable);
 
 				if (assetsForListing.Count == 0) {
 					// We're not eligible, record this as a valid check