Good for
Used calculators for collectors
The HPs and TIs collectors look for: the red-LED Woodstocks and the HP-34C, the short-lived HP-10C, the 15C and 16C, the HP-41 series and its modules, the 42S and 28S, the 12C special editions and the TI-58C and TI-59. Condition and originality decide everything here, so check for leaked batteries and broken contacts, and make sure a listing isn't a reissue, a clone or a different model in the same body.
17 calculators we cover.
HP
FinancialHP 12C Platinum 25th Anniversary
- Launched
- 2006
- Entry and display
- RPN or algebraic · LCD
- Features
- Programmable · Keeps memory
$35–$50 typical ask
41 on eBay
HP
FinancialHP 12C Prestige
- Launched
- 2008
- Entry and display
- RPN or algebraic · LCD
- Features
- Programmable · Keeps memory
Specs and what to check →
HP
VoyagerHP-10C
- Launched
- 1982
- Entry and display
- RPN · LCD
- Features
- Programmable · Keeps memory
$180–$200 typical ask
4 on eBay
HP
VoyagerHP-15C (original)
- Launched
- 1982
- Entry and display
- RPN · LCD
- Features
- Programmable · Keeps memory
$95–$200 typical ask
45 on eBay
HP
VoyagerHP-16C Computer Scientist
- Launched
- 1982
- Entry and display
- RPN · LCD
- Features
- Programmable · Keeps memory
$160–$280 typical ask
33 on eBay
HP
RPN programmableHP-41C
- Launched
- 1979
- Entry and display
- RPN · LCD
- Features
- Programmable · Keeps memory · Mag cards · Plug-ins
$200–$400 typical ask
23 on eBay
HP
RPN programmableHP-41CV
- Launched
- 1980
- Entry and display
- RPN · LCD
- Features
- Programmable · Keeps memory · Mag cards · Plug-ins
$190–$290 typical ask
79 on eBay
HP
RPN programmableHP-41CX
- Launched
- 1983
- Entry and display
- RPN · LCD
- Features
- Programmable · Keeps memory · Mag cards · Plug-ins
$280–$460 typical ask
28 on eBay
HP
RPN programmableHP-25
- Launched
- 1975
- Entry and display
- RPN · LED
- Features
- Programmable
$170–$310 typical ask
23 on eBay
HP
RPN scientificHP-27
- Launched
- 1976
- Entry and display
- RPN · LED
$370–$460 typical ask
4 on eBay
HP
RPN programmableHP-29C
- Launched
- 1977
- Entry and display
- RPN · LED
- Features
- Programmable · Keeps memory
$440–$450 typical ask
1 on eBay
HP
RPN programmableHP-34C
- Launched
- 1979
- Entry and display
- RPN · LED
- Features
- Programmable · Keeps memory
$370–$380 typical ask
1 on eBay
HP
RPN scientificHP-42S
- Launched
- 1988
- Entry and display
- RPN · LCD
- Features
- Programmable · Keeps memory
$190–$260 typical ask
19 on eBay
HP
GraphingHP-28S
- Launched
- 1988
- Entry and display
- RPN · LCD
- Features
- Programmable · Keeps memory
$80–$140 typical ask
31 on eBay
HP
GraphingHP 48GX
- Launched
- 1993
- Entry and display
- RPN · LCD
- Features
- Programmable · Keeps memory · Plug-ins
$230–$340 typical ask
45 on eBay
Texas Instruments
Algebraic programmableTI-59
- Launched
- 1977
- Entry and display
- Algebraic · LED
- Features
- Programmable · Mag cards · Plug-ins
$80–$160 typical ask
10 on eBay
Texas Instruments
Algebraic programmableTI-58C
- Launched
- 1979
- Entry and display
- Algebraic · LED
- Features
- Programmable · Keeps memory · Plug-ins
$40–$85 typical ask
9 on eBay