I recently picked up a 5 sided "Hey Kids". it has the 4 legged chrome stand with the greyish painted wire racks.
Question: What year(s) are these "Hey Kids" racks from? I was originally thinking 80's but are they older?
No, I think they range from late 50's through to early 70's. The 70's racks were the ones with the topper with cartoon illustrations of Superman, Archie, Richie Rich and Spider-Man.
The drug store where I bought comics in the early-mid 1970s had two "Hey Kids" racks.
It's possible they were older as that drug store had been there for 30 years before that.