According to my Terapeak Research service, in the past 90 days there have been 8 King Super 20 tenors sold on Ebay. The only silversonic sold for $5000. The other 7 "regular" Super 20's ranged from $2100 up to $4225 with an average of about $3100. Someone paid $1000 for one with several mangled and broken keys, and someone else paid $800 for just the body of one without a neck or any keys. I can go back an entire year, but this should give a good general idea of what folks are paying for them. The one I recently overhauled for a customer was the best made vintage sax I had ever worked on.