These are all additions and enhancements to the same basic machine which produces the same product, printed paper. Though all these advancements are great and they certainly affect the price of the machine, which ranges from roughly $40 to well over $1,000, the 3D copier is a completely different machine with its high-end functions that well exceed traditional systems.
Due to its recent introduction into the consumer market, these products are still considered costly and out-of-reach for the average consumer. They can be found in some tech shops, online, and even a few home goods stores, but usually cost over $1000. The price is a reflection of the machines ability to produce not paper, but plastic products.