$50 for Nexus/Global Entry. The best $50 I can remember spending - no questions, no stamps, no searches. Just hand a paper card and declaration form to the CBP person at a desk and off you go.

I can assert my right to remain silent, and force CBP to admit me as a US Citizen, but I can't stop them from entering some nefarious info on their computer and subjecting me to a hassle every time I travel.