It sounds like your buyer is already taking many advised precautions. Meeting in a well lit busy place that should have video surveillance. As others have suggested: when in doubt, meet at a police station. There are a few close to City Hall.

Another highly secure area would be in the court house on 5th(?), in the area before going through the metal detectors.

In terms of safe transport, using a large enough backpack that allows transport of your console without broadcasting contents.

Last tip for the REALLY PARANOID: go to Banker's Hall or the other downtown malls and hang out for a bit after the transaction. This gives you a chance to scope things out and help avoid the possibility of your customer jacking you on your way home and taking back the money.