I have one of these Jedson banjos. It's from the 30's best I can tell. It's the birdseye maple pot w/ a White Ladye tone ring. I believe mine was originally a tenor or plectrum. My 5 string neck, though well enough crafted is not original. The 5th string on mine is tunnelled. You can see pics of it here
http://www.banjohangout.org/myhangout/photos.asp?id=27941
Somewhere online I had seen some digitized Jedson vintage catalog pages. The original 4 string necks were 7 or 9 plys including some w/ bright red laminations for color.
I bought mine from someone in the UK. I paid about $500 plus s&h to the US. Sorry, no $20K.
It's a beautiful banjo w/ some unique features that differ from US made banjos.