Monitoring Lego prices is my full-time job. (Not as glamorous as it may seem.) I know as well as anyone that there are a lot of "incredible" sales and "can't miss" deals. Truth is, you can miss most of them. I'm not going to waste your time by showing you the same old Lego discounts that—quite frankly—happen all the time (at 15 percent off or less).

Instead, thanks to Black Friday , I found Lego deals that are actually substantial and worth grabbing for yourself or as Christmas gifts . Take this pair of mini McLarens that's 30 percent off, for example. Pretty hard to beat for young Formula 1 fans. There's also a 20 percent off deal on a scale model designed for adults to build and display that includes a functional steering wheel and a detailed version of that turbocharged V6 engine

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