"I used to wonder why Lego did not sell sets like these. Before you had to go to third party websites to get these things. Now I just include one or two in my bag after each order. It would be great if they keep these XTRA sets for a while/years and include more such as: minifig accessories, minifig torsos or body parts, tech (computers, radars, touch screens like in the jungle sets), glass doors, ornament pieces, street signs. The possibilities are infinite just like everything else in the Lego world."