Roblox shop GUI script

A shop screen that sells tools for coins. The prices live on the server and the server does the sum, so a cheater can't buy anything for free.

Where it goes

1You need a Coins stat: the leaderboard script makes one. Put each Tool you're selling in ServerStorage.
2In ServerScriptService, add a Script with the first code, and change PRICES to your tools' exact names and prices.
3In StarterPlayer, then StarterPlayerScripts, add a LocalScript with the second code, and press Play.

ShopServer · a Script in ServerScriptService

1-- From forja.us/tools/roblox-scripts/shop-gui2-- Sells tools for coins. Prices are here, on the server, so players can't change them.3local Players = game:GetService("Players")4local ReplicatedStorage = game:GetService("ReplicatedStorage")5local ServerStorage = game:GetService("ServerStorage")67local PRICES = {8	Sword = 100,9	Flashlight = 50,10}1112local shop = Instance.new("RemoteFunction")13shop.Name = "Shop"14shop.Parent = ReplicatedStorage1516local function ownsAlready(player, itemName)17	local backpack = player:FindFirstChildOfClass("Backpack")18	local character = player.Character19	return (backpack and backpack:FindFirstChild(itemName)) or (character and character:FindFirstChild(itemName))20end2122shop.OnServerInvoke = function(player, itemName)23	if itemName == nil then24		return PRICES25	end26	local price = PRICES[itemName]27	local tool = price and ServerStorage:FindFirstChild(itemName)28	local leaderstats = player:FindFirstChild("leaderstats")29	local coins = leaderstats and leaderstats:FindFirstChild("Coins")30	local backpack = player:FindFirstChildOfClass("Backpack")31	if not tool or not coins or not backpack then32		return "That isn't for sale."33	end34	if ownsAlready(player, itemName) then35		return "You already have it."36	end37	if coins.Value < price then38		return "Not enough coins."39	end40	coins.Value -= price41	tool:Clone().Parent = backpack42	return "Bought!"43end

ShopScreen · a LocalScript in StarterPlayerScripts

1-- From forja.us/tools/roblox-scripts/shop-gui2-- Builds the shop's buttons from the prices the server sends.3local Players = game:GetService("Players")4local ReplicatedStorage = game:GetService("ReplicatedStorage")56local shop = ReplicatedStorage:WaitForChild("Shop")78local screen = Instance.new("ScreenGui")9screen.Name = "Shop"10screen.ResetOnSpawn = false11screen.Parent = Players.LocalPlayer:WaitForChild("PlayerGui")1213local list = Instance.new("Frame")14list.Size = UDim2.fromOffset(220, 0)15list.Position = UDim2.new(0, 16, 0.5, 0)16list.AnchorPoint = Vector2.new(0, 0.5)17list.AutomaticSize = Enum.AutomaticSize.Y18list.BackgroundTransparency = 119list.Parent = screen2021local layout = Instance.new("UIListLayout")22layout.Padding = UDim.new(0, 6)23layout.SortOrder = Enum.SortOrder.Name24layout.Parent = list2526for itemName, price in shop:InvokeServer() do27	local button = Instance.new("TextButton")28	button.Name = itemName29	button.Size = UDim2.new(1, 0, 0, 40)30	button.Font = Enum.Font.GothamMedium31	button.TextSize = 1632	button.Text = itemName .. ": " .. price .. " coins"33	button.Parent = list3435	button.Activated:Connect(function()36		button.Text = shop:InvokeServer(itemName)37		task.wait(1.5)38		button.Text = itemName .. ": " .. price .. " coins"39	end)40end

How it works

The client only asks to buy a name. The server looks up the price and does the sum, so a cheater can't send their own price.
A RemoteFunction sends an answer back, which is what shows on the button.
The buttons are made from what the server sends, so a new line in PRICES adds a new button.

Make it yours

Keep what they buy: This lasts until they reset. Add a copy to the player's StarterGear as well, and it comes back after a respawn.
Make it look like your game: The look is all in the second script. Or start from a UI kit.

Want something more? The script generator can write it: “A shop screen where players buy tools with coins, with a picture and a price for each”