Start with Open Library or Project Gutenberg to see if older, public-domain translations (like those by Eugene Feifel) are available.
Finding a "best" English translation of the Baopuzi (抱朴子) by Ge Hong can be challenging because the work is massive, and no single translation covers the entire text in one affordable volume. baopuzi english translation pdf best
While primarily a translation of Ge Hong's Shenxian zhuan (Traditions of Divine Transcendents), it includes extensive scholarly commentary and translated fragments relevant to the Baopuzi . Start with Open Library or Project Gutenberg to