I've made a few good sales from library finds, usually on more timeless or slow-changing technology books. A COBOL book holds value a lot longer than a Java or

I've made a few good sales from library finds, usually on more timeless or slow-changing technology books. A COBOL book holds value a lot longer than a Java or .NET book. I've tried without success to convince my local Friends of the Library to sell the more profitable incoming books online themselves.