What is the cheapest real estate in Colorado?

Undeveloped land - dirt - is almost always the cheapest real estate, regardless of the state you're looking to purchase in. With Colorado's recent legalization of marijuana for recreational purposes, a massive rush (no pun intended) of investment capital has been pouring into the Mile High State over the past 24 months. As such, real estate values have gone through the ceiling - as would be marijuana cultivators, and pot entrepreneurs rush to fill the national void of the society looking to get high.