Design Institute of America corner nesting tables

Set of 2 DIA corner-shaped nesting tables on wheels, glass topped with I assume brass frames. I received these from a family friend's house clear out and I don't know what was originally paid for them. There is a plate with the DIA brand, date (1984), and what looks like a serial number (pictured). I have found other DIA side/nesting tables for sale online, but nothing resembling these. Would love to get an idea of what they are worth.