How do I make a skip stage button on an obby?

Ive tried many different methods but they all didn't work, so instead i'm asking on here.

It depends on how you have your obey designed. I would get a table value on each of the spawns and get a value on which spawn the player is on. and by using "MarketPlaceService" you can make the button sell a Product and when the purchase is complete. it changes the player's characters CFrame to your players spawn value in the table + 1

local Tables = {Spawn1,Spawn2,Spawn3}

function SendPlayerToNextSpawn(plr)
local char = plr.Character
char:SetPrimaryPartCFrame(Tables[plr.CurrentSpawn.Value+1].CFrame)
end