I use three devices for e-reading: MY Kobo H2O2 for almost everything, and either my Huawei M3 8.3 or my PC for PDFs that need colur and larger screens. I have never kept old e-readers, but I did convert my 85 yo Dad to e-reading my giving him my PW2 when I got my Clara HD (which I sold to defray tyhe cost of getting my H2O2)