Not familiar with Mcarthur Park (oops........Glen, hope it doesn't melt in the rain), but I've been to similar places and looked in the watch shops. Good value can be found on certain models, but my advice is to inspect the watches very carefully. I'm always suspicious about shopsoiled and returned examples beng sold this way........buyer beware. Same advice applies to any watch in an ADs store, Look carefully for signs of damage.
Paul