Mattel’s Lego-like Xbox 360 building set just received its first discount

It wasn’t easy to grab ahold of the Mega Xbox 360 building set when it was first launched in September, but not only is it now in stock, it’s also on sale. Right now, you can buy the adorable collector set at Target for $99.99 ($50 off) — an all-time low and its first discount to date.The Target-exclusive set comes with 1,342 Mega Bloks you can use to build a replica of Microsoft’s…