The drill press was made between 1944-48. In 1948 Walker Turner was purchased by Kearney & Trecker and became the "Walker-Turner Division of Kearney & Trecker and was badged as such.
It's almost impossible to provide an estimate on worth from one frontal picture and realistically, without seeing it in person. Does it have the slo-speed pulley attachment, does it have the original Walker Turner on off switch on the left side of the head frame? What is the condition of the spindle pulley, is it chipped or cracked? It's great that it has a driver line motor which was made by Kingston-Conley, how does it run? Almost surely the bearings need replacing. The spray bomb job is atrocious and will have to be addressed. So many unanswered questions from one picture.
If you need a drill press, a benchtop Walker Turner 900 series if it's in good condition will provide good service. $200 is decent if it runs well and it's all intact, $300 is stretching it. If more is asked and it's without accessories, pass on it and wait for another Walker Turner or Delta that will inevitably pop up. They always do.
Having said that, if you want it and are handy enough to make it work for you and to maintain it, and it's within your budget then buy it.