[ForSale-Swap] Eimac Tube Question

[Bob Kocisko]

For the K7NII (SK) estate that I'm representing, came across 2 wrapped NOS Eimac tubes.  They are the 592/3-200A3 which is a medium-mu triode.  Max plate dissipation is 200 watts & they're are gud at max ratings to 150MHz.  They hv a glass envelope with 3 pins on the base, 2 pins on the side & one on top for anode.  

Is anyone familiar w/ these tubes & hv any idea what they're worth?

Tnx & 73,
Bob, K6PF