I just had it done this weekend. Paid about $270 for:
Chrome 20 on the front windshield above the A-Line;
Chrome 50 on the front windows, and
Chrome 35 on the back windows.
PS: The legal tint limits in Virginia are 35 on the backs, and 50 on the fronts.
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2010 370z Tour/Sport; Black Cherry/Grey; 6MT