builders club was roblox's first membership club which could only be used through a purchase. builders club gave its members more features in roblox, such as earning its virtual currency called robux, and the ability to trade items. another thing players could do was sell limited items (buy-able and sell-able items on the avatar shop). there were three types of builders club: classic, turbo, and outrageous. classic was the original builders club type and outrageous was the newest. players would either buy it monthly or annually.