Transformers: The Headmasters

LEGO has a lot of really cool sets for adults these days. If you find yourself looking to build yourself something awesome out of plastic bricks, you're absolutely spoiled for choice. But one being in stock right now doesn't mean it will be around forever. LEGO is retiring a ton of sets at the end of July and many of the best sets for adults are on the chopping block.While a few of the sets on the list have already gone completely out of stock online, most of them are still available to buy. In fact, quite a few retiring LEGO sets are actually getting Prime Day discounts right now. Thi