[Hallicrafters] 5U4 Rectifier Tube

[David C. Hallam]

There is currently on eBay an auction 9731847290 for a pair of NOS Genalex
5U4 rectifier tubes.  The current bid price for the pair is $327.  Can
anyone give me a rational explanation why these tubes should go for that
much money?  I understand about the audiophooles and all of that, but,
seriously, why should they be worth that much money to anyone?

David
KC2JD