To all,
This isn't a debate over the merits of old HP's, new HP's or future HP's (right), the subject has plenty coverage already. My father used the calculators for thirty years, mostly while teaching statistics at college. He FINALLY did a big project using an HP-28C I bought for him when it was first introduced. He loves it, possibly more than his long retired 67. But now he wants more and ask me what he could get. I own a 48GX down to a 10B, plus the usual collection of in-beweens.
I'll divide HP's into two catagories - big ENTER keys and the current, almost missing, ENTER keys.
So, all things considered, when you see my posting in the Classified ad's, it's for my father. I figure another 28, an S version, because he likes it and a 48GX because I use it and have all sorts of stuff to go with it - manuals, hacker junk, experience. And ---- big ENTER key!
Joe
PS: This first one we ever owned (and still do) is a 45, purchased a few months after it's introduction. It was hot. Some guy got it from a friend and had more use for $50 than all the advanced engineering, scientific, slide-rule features. That's one rationalization I've yet to see for past, present & future HP's debated at this site: greater demand in the black market!