The University of Hawaii Press is having a spring cleaning sale, with discounts of up to 95%.
This is the press that puts out the terrific ABC series dictionaries. These include the ABC Chinese-English Comprehensive Dictionary (sale price US$40.20), the ABC Dictionary of Chinese Proverbs (Yanyu) (US$12.00), the recent and very handy ABC English-Chinese Chinese-English Dictionary (US$12.00), and the ABC Etymological Dictionary of Old Chinese (US$38.40).
William Hannas' excellent Asia's Orthographic Dilemma is for a short time only US$1.20. If you don't have it already, buy it.
J. Marshall Unger's wide-ranging Ideogram: Chinese Characters and the Myth of Disembodied Meaning is only US$2.90.
John DeFrancis' Visible Speech: The Diverse Oneness of Writing Systems is only US$1.70 -- and that's for a hardback. His The Chinese Language: Fact and Fantasy, one of my favorite books, is US$13.80.
Taiwan history titles include When Valleys Turned Blood Red: The Ta-pa-ni Incident in Colonial Taiwan, now just US$3.30 (normally US$66).
Check out the many, many titles. Here's the sale catalog.
Edit: It looks like shipping to Taiwan is expensive. So you might be better off shipping to a friend or relative in the States and arranging for delivery after that.