[Milsurplus] Puzzling Epay Example

[Hue Miller]

Whats yer take on this?
A BC-348 recently closed, at $336.
Now, it had control shaft hole vacant (light dimmer?)
Had some kind of numbered skirt added to the tuning knob.
Had shockmount.
Had external, open chassis (non cabineted) AC supply.
BC-348's are not rare, and they are on Epay every day of the year.
Feeding all of the above into the hopper, how does the price figure?
Or is my off-the-cuff rule of thumb validated:  "Figure the maximum
expected bid price, and double it." 
Yes, I know it's an auction ( read, "Irrational" ), but what was the 
attraction of this BC-348?  -Hue Miller