Purchasing Older vs Newer Versions of Books

[arrmatey3]

Hi all,

This is a pretty specific question, but if anyone has some advice, it would be greatly appreciated. I have the option of paying full-price for newer versions of books vs about half-price for older versions. What would you guys go for?

1. The Berkeley Review Biology = 2015 vs 2017
2. The Berkeley Review Organic Chemistry = 2016 vs 2017
3. Kaplan Behavioral Sciences Review = 3rd edition vs 4th edition (2018-2019 version)

Thanks for any input!

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[sjcha]

Older versions. Basically no difference (maybe a few words/formatting) here and there. Save yourself some money because you will need it during the app cycle.