I took all the AP courses offered at my high school, but couldn't afford to pay the fee for all those exams. I only took 1 exam, Calculus, and did well but I ended up going to a community college and I was the first student they had ever had who came in with AP credit. However, they only gave me credit for 1 semester of calculus. When I transferred to a 4 year university, they gave me 2 semesters credit. Unfortunately, dual enrollment was available when I was in high school.
I'm an Asst Registrar (and part-time grad student - again), and I see students come in fresh out of HS and have almost enough credits to be a junior!