Until Halloween, Wiley is offering 25% off microbiology and virology texts. So I took two books from their offerings that looked interesting and compared them to the Amazon prices:
Studies in Viral Ecology, volume 2 sells, used, for $106 on Amazon and, with discount, $104 from Wiley.
Fundamental Medical Mycology sells, new, for $88 on Amazon and, with discount, $74 from Wiley.