☛Much of Rufinus is not available in translation. A 1997 translation of his Church History (which continues Eusebius) by Philip R. Amidon commonly goes for about $200.
NPNF: Volume III. Theodoret, Jerome and Gennadius, Rufinus and Jerome.
Tyrannii Rufini Aquileiensis presbyteri Opera omnia. —Migne edition. Paris, 1878