You could definitely bargain with some vendors.
The seafood selection left much to be desired.
The prices weren't always the best, but you could score cuts you wouldn't find at the Giant or Safeway.
The set up wasn't open like it is now. It was largely walled off with all these tiny rooms out of which vendors might sell boxes of serial, or tube socks.
Looking back through these photos I can't help but think of a lot of the markets I've visited in Baltimore. I'm not sure if I have any photos showing this, but there were definitely stands selling food intended to be consumed immediately.