Math 51 Linear Algebra by Levandosky: $45 ($70 used at bookstore)
Polisci 114D Democracy Development and the Rule of Law Course Reader (~1000 pages): $75 ($200 new)
Econ 106 World Food Economy Course Reader: $30 ($80 new)
Econ 50 Microeconomics by Besanko (3rd Edition): $10
Econ 102A The Practice of Business Statistics by Moore (2nd Edition): $10
Physics 41,43,45 Physics for Scientists and Engineers by Knight (1st Edition all volumes) + solution manual + workbook: $20 (for all 3)
PRS: $25 (for Econ, Physics classes)