Investing in Lego ? Do you invest in skiing, or in videogames, or in books ? The Lego passion is cheaper than Ferraris or golf. Cheaper than a lot of things, in fact. There's a lot of ways to get cheap sets, and more to get very cheap bricks (especially if you are in the US). Sell an old set from time to time to meet and please a collector, may be, and it's quite simple. But sell old sets to make money, it's quite hard I think,, and it takes quite an organization (it's a part-time or a full-time job). May be you'll get better advices on specialized sites...