That HP16C I left at work, although at the end I don't think there was anyone left who would have missed it! I have wondered what happened to it. But while I was still working there I got my own 16C in the form of a warranty replacement unit from EduCalc. They used to send out catalogs quite frequently and one time on the inside front cover they advertised HP15C's for $35 and 16C's for $30, just the calculators, warranty replacement units - like the 42S's HP Parts sold a few months ago. I tried to order one of each but by the time I called they were out of 15C's.
I just dug up my collection of EduCalc catalogs to refresh my memory. They first show up in catalog #56, Summer 1992. HP11C for $29.95, 15C and 16C for $34.95 (calculators only, with 1 year warranty - at least with the 11C and 15C) and 82240A IR printer complete for 74.95 (because the -B had replaced it for $115.95 [$135 list]). In catalog #57, Fall 1992, they only had the 16C and the 82240A, same prices. I don't remember if I asked about the 11C. I was familiar with the 15C because a co-worker had one. Another co-worker had a 71B and three others had 41C's, although two of them owned the same one serially, which I then became owner of! Around this time Educalc was letting people trade-in their older HP calculators toward an HP48S/SX and then selling the used calculators. I got a 71B with HPIL for $89 and a 41CX, what would now be considered "NIB" down to the pamphlets, for $80. I also got various memory modules, application pacs, HPIL, wand, etc. for the 41 as used or closeout. I ordered an 82240A at the closeout price when I got a 41C IR module and they sent me a -B!
EduCalc was great. I got a few more bargains when Jim Carter had a final closeout of his remaining stock (as reported here - this was several years ago) including another warranty replacement unit - a 14B, which is a pretty decent little financial calculator, the first Pioneer I owned. I think he was selling them for $5! When the box arrived, I found he had thrown in several EduCalc coffee mugs and a leather HP48 memory card pouch - maybe one day I will be able to afford a card to put in it!
As I recall the trade-in program, I wonder if they were taking in any LED calculators? They were taking 41C's and the 34C came out the same year, I think. I guess I wasn't aware of the LED calculators and didn't think to ask. Thumbing through the catalogs, I see they were selling batteries and chargers for the older units.
Another thing I wonder about the trade-in program - how many people got caught up in the hoopla about the 48, traded in the 41C's and 71B's, and then regretted it?
I looked up the details of the trade-in program in catalog #56 and they actually had two programs: $45 credit for a 19B, or $55 for a 19BII, towards a 95LX; or $45 credit for a 41CV, or $60 for a 41CX or 28S, towards a 48SX ($274.95, $350 list). It doesn't specifically say you can trade-in towards a 48S ($154.95, $199 list). It also says that if you prefer to keep your old machine until the new one arrives, you can send it in later and they will send a refund. All trade-ins had to be in working order with all manuals. In the same catalog #56 the only used calculators they were advertising for sale were 17B ($49.95) and 19B ($79.95) - with manuals and EduCalc 6 month warranty - and the HP75D/9114B disk drive/2225B printer package ($279) with manuals and 30 day warranty (yes, I bit on that one too). Catalog #57 had the same trade-in programs and used calculators plus a page of 71B's both used ($89.95) and new surplus ($159.95), both including HPIL module and 1 year EduCalc guarantee (manuals extra), along with a list of accessories.
By catalog #61, Fall 1993, the 16C's and 82240A's were gone, the trade-in programs were: $45 credit for a 41CV, or $60 for a 41CX or Card Reader, or $50 for a 48S, or $95 for a 48SX towards ... doesn't actually say but it is on the page after the 48G ($134.95, $165 list) and 48GX ($274.95, $350 list), and $200 credit for a 95LX with 1MB RAM towards a 100LX ($719). The used calculators were 28S ($79.95), 48S ($65), 48SX ($129), and 95LX1BM (call for price), and the 71B new/used reduced to $129.95/$79.95.
Going back a little, catalog #54, Winter 1992, had the same trade-in programs as #56 but the only used equipment advertised was the 75D package and they were still selling 41CX new for $184.95 ($249 list) although it says HP had already discontinued it. Also mentions EduCalc had a separate 41C/71B/HPIL catalog.