Eugene, Tropic Tint is in Union...same building as IMG and they do great work.
It's not $100, though. They advertise that they 'fix $100 tint jobs'!
They just got in some new ceramic tint...forget the name...but it's got some crazy warranty, maybe lifetime...though it costs twice what 3M does. Anyway, Alex and Frankie do great work. IDK pricing on e36, but the coupe does cost less than sedan.
It does all the bmw dealers cars around the area...they're really good...and you know I wouldn't kid you!