Thank you for submitting your item for appraisal. This appears to be an old fashioned electric single person sauna, patented in Dec. 1, 1942 as a Howard Health or Humid air Cabinet, possibly manufactured in the 1950s. There is hardly any demand for saunas of this type anymore, and there are very few museums collecting such health related items. Auction houses would refuse to accept it for auction. The estimate is based on similar saunas offered or sold online in the recent past.