Lego Fortnite building sets are on sale for terrific prices at Amazon. The most notable deal is the 691-piece Supply Llama model for only $26 (was $40). This is the lowest price ever for the budget-friendly model of the Fortnite mascot. For an even cheaper Fortnite Lego set, check out the 193-piece Durrr Burger for only $8.79 (was $15). The Durrr Burger is one of two Fortnite sets from last year's launch lineup that Lego is retiring soon.