Pity the poor 290E. It's a big slug of a driver, full of Alnico even, but gets no respect.
A pair just went on the bay for $260.
Altec Lansing 290E midrange driver pair

Contrast that to a pair of 288-16H drivers that went for $1300!!
ALTEC LANSING 288-16H DRIVERS

Amazing the differences. And the valued Altec stuff seems to be getting high prices right now. But it has to be the coveted stuff. Might be time to list a few things...