Florence Knoll table, any idea on what its worth?  

Hey people,
I have a question concerning a T-angle iron frame table from knoll (black steel frame and white top)
The table is in a fairly good condition given its age, the people that sell the table bought it in the late 60's. Asking price is 350?.
Its not a coffee table but a small kitchen table (72x86X87cm)
I don't really need the table for our kitchen since we have a small ikea table but if this is a bargain than i'm willing to replace the ikea table with the knoll one, only if the price is ok, i'm not really sure about the asking price. I'm hoping some of you fine people whom know more about this stuff than i do, could help out: is this a good deal or should i walk away?
thanks for all help, its appreciated.