Good for
Used calculators for surveying and real estate
HP sold application pacs for the HP-41, including Surveying and Real Estate, which plug into the 41CV's and 41CX's free ports. TI sold Surveying and Real Estate Investment modules for the TI-58C and TI-59. For mortgages and loans, the HP 12C and 12C Platinum have time value of money and amortization on the keyboard. Before you buy an HP-41 for field work, check the battery compartment for corrosion and that each port works.
6 calculators we cover.
HP
FinancialHP 12C
- Launched
- 1981
- Entry and display
- RPN · LCD
- Features
- Programmable · Keeps memory
$15–$35 typical ask
439 on eBay
HP
FinancialHP 12C Platinum
- Launched
- 2003
- Entry and display
- RPN or algebraic · LCD
- Features
- Programmable · Keeps memory
$30–$50 typical ask
108 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
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