Brethren Works

BRETHREN WORKS
For some reason unbeknown to me the prices of  Brethren books have escalated to dizzying heights. Some years ago I sold a significant number of Brethren titles. A little while ago, grieved by such stupidity, I ventured to purchase as many titles as possible. Many of the books are nigh impossible to find, and many more fetch astronomical prices. Buying from the U.S. is beyond the "purse" of the vast majority (I suspect) especially with soaring postal charges; despite the relative weakness of the dollar.
Does anyone know the reason, or at least have an informed opinion, as to why these "works" have become so desirable and expensive? There appears to be so much hostility directed at the "Brethren, commonly so called," with many of the distinctive features of "our" way of gathering being derided. Brethren of earlier centuries (19th & 20th) are spoken of contemptuously, along with their distinctive teaching. "Dispensationalism"and "The Rapture" are particular subjects of ridicule. So, why do these books command such prices? I must admit to be completely baffled. Is it possible that there is a "remnant testimony" and each and all of us are unaware of one another? How precious that would be!!