LEGO has focused more on the 18+ age range in recent years, releasing plenty of LEGO sets for adults. One of the ways this manifests is in sets that play to adults’ nostalgia for when they were kids.

If you're into complex LEGO builds, Transformers toys, or both, have we got a deal for you. Today Amazon is offering the LEGO Transformers Optimus Prime for only $143.99, a 20% drop from its $180 MSRP ...