U S Missile Bases For Sale On E-Bay

There are some former U S Missile Bases for sale on the internet. In Washington State there is a base for sale on e-bay for $1.5 mil. There are miles of underground tunnels and silos.

The site covers 56 acres.Since the government sold it in the seventies, it has been used as a summer camp.They are being described as "Castles of the 20th century"

I am wondering if these places were ever radioactive, and who would like to live there or have a camp there?