If you are a Star Wars fan you should buy the carbonite chamber. This has been a set before but this version is the best of the 2. # minifigures are included, which are Han Solo, Bobba Fett, and a Ugnaught. There are also many play features included into this set which makes it worth the price of $30 retailing in the U.S. This set also fits perfectly together with the new UCS Slave I.
The old Death Star won't be worth as much because new and UCS Death Star will be coming soon sometime next year. There are new official images because it is still a rumor. If the new Death Star comes you should consider buying it.The Death star can be updated by making it bigger and more details than the other Death Star.
Consider buying Lego Prison Island if you are building a Lego city. This set is better than the swamp theme released in 2014. This set is worth it for the price and has a lot of play features that Lego hasn't given us in a long time. There is also a hot air balloon which was in Lego Friends but they changed the color to make it fit in this set. The price point for this set is higher than a dollar but the play features add more value making it costly. The sewer in the end of the set is not recognized for how greatly t is built and the prison can escape from it. Consider buying the Lego City Prison Island.
The new Nexo Knights theme is now released. The theme is very similar to the castle theme but it's using more modern weapons for more play feature for kids. Kids from ages 6-8 should like it depending on whether or not they like Legos. The new theme can make more money than the castle theme because it has more play features. The Nexo Knights theme also has episodes that go with on lego.com. A decent number of sets will be released with a good price range.