Microsoft Academic Pricing for Exams
I came across a little tidbit of information last year that I haven't seen listed anywhere else so I'd thought I share. Microsoft offers academic pricing for students. When you go to register for the exam, choose the test prefix 72 instead of 70. Then provide your school email address (it may have to have a .edu domain) and your student ID. For all the $150 tests I've taken, the price drops to $83, so that's quite nice. The 72 tests still counts towards all certifications. I took 72-640/642/646 last year for MCSA 2008. I don't know if they verify your student status somehow, so if you're no longer a student, I would be hesitant to use it.