Want to know where the country’s most exclusive retail addresses are? Real estate services firm Colliers International just released the list of Top 9 Most Expensive Retail Streets in the U.S. Expensive, however, is a relative term. Retail spaces on some of these streets cost thousands of dollars per sq. ft. per year. Other successful retail corridors, on the other hand, cost only slightly more than $100 per sq. ft. For an in-depth breakdown, click through our slideshow.