text: The underground property has changed hands over the years. The property sold in 1990 for $1.3 million after Henderson passed away, and again in 2005 for $2 million. The current owners bought it in 2014 for $1,150,000. In 2019 it was again on the market for $18 million, then in 2024 reduced to $5.9 million. The purchasers, under the name "Society for the Preservation of Near Extinct Species," made the decision to maintain their anonymity while acquiring the property, which is now recognized as the Stasis Foundation.