There is a Moog 91A theremin up for sale on ebay. The theremin is located in Saint Louis, Missouri, USA. The auction is scheduled to end on August 6th.
The starting bid price is a hefty $3000 (USD). It is said to be in excellent condition, but no actual photos are offered.
Moog 91A (http://cgi.ebay.com/Big-Briar-Theremin-91A_W0QQitemZ300135450675QQihZ020QQcategoryZ1287QQssPageNameZWDVWQQrdZ1QQcmdZViewItem)
The starting bid price is a hefty $3000 (USD). It is said to be in excellent condition, but no actual photos are offered.
Moog 91A (http://cgi.ebay.com/Big-Briar-Theremin-91A_W0QQitemZ300135450675QQihZ020QQcategoryZ1287QQssPageNameZWDVWQQrdZ1QQcmdZViewItem)