BIO 41
Genetics, Biochemistry and Molecular Biology $19 (good condition) Bookstore will rip you off. Also, prepare for BIO41 by reading the coursereader during the summer! It is a custom made one by BIO41, so only the bookstore carries it during early Fall quarter.

Biochemistry, Berg 6th Edition $90 (very good condition) Costs $170 in amazon.com, and much much more at the bookstore, so buy it from me!