Make sure you have 1 inventory slot or how many your buying!
x1 --- Duration 2 Day --- Special Golden Pickaxe ---
x1 --- Duration 3 Day --- Special Golden Pickaxe ---
x1 --- Duration 4 Day --- Special Golden Pickaxe ---
x1 --- Duration 5 Day --- Special Golden Pickaxe ---
x1 --- Duration 6 Day --- Special Golden Pickaxe ---