They specifically said in the announcement interview that they designed the super-charger to be possible to hide for a car-accurate presentation to satisfy Lambo, as well as the doors, hood, and lights, and those extra parts contributed to the final cost. Most likely, they knew damn well that some people would balk at the higher cost so they pointed it out in that interview. You also have to keep in mind that the line has evolved, and they're targeting the last few tough licenses, so they're working with Lamborghini a second time to present a new version of the same car. They probably had higher demands from them on the more established MP line these days - that's pretty normal when you have to go back to someone for a second round of a license. Yes, because they take up space, but per unit it's very small. Put it this way, they're paying for the space it takes up on the shipping container and any special handling needed, but not the weight because toys are relatively light. The physical size does increase shipping costs, but again, that'd negligible to paying for multiple molds - plastic injection molds can be tens of thousands per piece molded - and wages for assembly. Even at the slave-labour wages in some countries, physically putting someone in a spot to remove pieces from a mold, clean them, apply paint apps, and assemble pieces as well as additional automation is a massive cost.