[Boatanchors] Rare Tube?

[Wilson]

Does anyone know anyone using Eimac 327As?
It’s a high frequency transmitting triode, used in SC and SK series WWII radar sets.
http://w5jgv.com/downloads/Eimac-appl-1-3-4-5.pdf
There are none listed on Ebay, which surprised me.
But one sold in the past   http://www.worthpoint.com/worthopedia/vintage-eimac-327-vacuum-tube-perspex-244654230
Maybe they are valuable, or worthless??
Wilson
W4BOH