Um... lol?
Anyways, ID's now have multiple characteristics that are difficult to replicate. Like glittery translucent insignia (kinda like watermarks all over the ID), complex background patterns that are shown through the picture on the ID, specific gradients on certain information, etc.
So, yeah, if you could get one that was passable, it would cost more than most would be willing to pay. People at checkpoints and clerks at stores are now instructed on how to spot fake ID's when anything security-sensitive or age-related is in question, respectively.