The value of “stationary” equipment, that cannot be easily shipped thru UPS/USPS/Fedex etc. is highly regional.
If you live near a major urban area with lots of “makers” the prices might be fairly high.
If you live in some rural or suburban area, were almost everybody had a home shop, then the prices aren’t going to be great, especially if there are condition issues.
The vintage column Craftsman equipment like that sort of looks “cool” so there might be more interest just because of that with the right audience.
For crguy;
The reason for that style of base was likely modularity, and maybe compactness for shipping.
Those bases were used for a variety of equipment, sometimes with more than one column.
Since a column system is already used for Drill Presses, which are and were a fairly standard tool. Most of the same equipment and setup could be used for machining the post mount in the base castings for a tablesaw or whatever, as would be used for machining the column mount in the base casting for a drill press.
The same tubular steel used for the drill press column could also be used for the base column on the saw making supply logistics easier.
Most equipment that used this type of column base, was essentially old school “Benchtop” sized machinery, although usually made with heavier castings than current benchtop machinery.
If a machine was slightly talker or shorter, using the equipment on a benchtop might be slightly harder for some people depending on height.
Witha column system like this, the column height could be made shorter or taller easily by the manufacturer to get whatever they considered the “proper” height, and I presume an owner could purchase the appropriate sized steel to make the stand taller or shorter if the were handy, to customize the height if necessary.
Were tablesaws routinely being used for breaking down large sheet material when these saw were being made?, Or was that mistly left for a handheld circular saw, or a Radio Arm Saw with a shop built table?