HP · Voyager · September 1982 to March 1984
The HP-10C was the last Voyager to arrive, in September 1982, and the most basic, even though its number suggests it came first. It's a programmable RPN scientific with ten registers that can turn into up to 79 program steps, but no editing, labels or subroutines. Wikipedia puts its problem plainly: the 11C offered twice as much for only a little more money. Sales were poor and HP dropped it in March 1984, after about eighteen months. That short run is why collectors chasing the full Voyager set of 10C, 11C, 12C, 15C and 16C find it the hardest to complete. Collector Tony Thimet measured it at about 7 percent faster than an 11C.
Good forCollecting
Bench check
Should come with it
Check the listing photos against this list, and ask the seller about anything you can’t see. A missing piece should come off the price.
No documented faults specific to the 10C. Check for leaked button cells, a complete display and every key.
New to old calculators? The condition checklist covers battery corrosion, displays, keys and card readers, and RPN in one hour gets you typing on an HP.
Buying guide
Only four HP-10Cs are for sale, all asking $186 to $200 delivered, so that's four sellers' asks rather than a market read. We'd buy the one at $186 delivered from a 99.8% seller, whose photo shows the display lit, though it has no case and no test claim. The two titled tested with a case share the same title on two accounts, one with zero feedback, so ask both for a photo of the serial label, where a number starting 22, 23 or 24 fits the 10C's 1982 to 1984 run. HP dropped the 10C after about eighteen months because the 11C did twice as much for a little more money, which makes it the hardest Voyager to find, and the 11C the better buy if you want one to use.
$186.33est. delivered
The lowest delivered 10C from an established seller, at $186, and the photo shows the display lit. It has no test claim and no case, so ask for a video of every key, both shifts included, typed once.
Hewlett Packard HP 10c Scientific Calculator Vintage Voyager Series RPN HP10C
Delivered prices include shipping as eBay quoted it to a US address on Oct 15, 2026. Many sellers charge by distance, so your total may differ. eBay shows yours before you pay.
Snapshot
Checked . Some may have sold.
Delivered prices include shipping as eBay quoted it to a US address on Oct 15, 2026. Many sellers charge by distance, so your total may differ. eBay shows yours before you pay.
Used$186.33est. delivered
$179.98 + $6.35 shipping
Buy It Now$179.98
This seller takes offers, and many sellers accept less than the asking price.
Fine if you might miss it? Send an offer first. Someone else can still buy it while you wait for a reply.
Want it for sure? Use Buy It Now.
Good buy
No case or test claim named. Photo shows the display lit.
Seller: riversiderelics24
99.8% positive
Used$195.82est. delivered
$189.00 + $6.82 shipping
Buy It Now$189.00
This seller takes offers, and many sellers accept less than the asking price.
Fine if you might miss it? Send an offer first. Someone else can still buy it while you wait for a reply.
Want it for sure? Use Buy It Now.
Our take
Titled with a case, no test claim. Photo shows the display off.
Seller: eclecticalane
100% positive
Used$185.68est. delivered
$180.00 + $5.68 shipping
Buy It Now$180.00
This seller takes offers, and many sellers accept less than the asking price.
Fine if you might miss it? Send an offer first. Someone else can still buy it while you wait for a reply.
Want it for sure? Use Buy It Now.
Check the seller
Zero-feedback seller, and the same title as ferny111's listing. Ask for a photo of the serial label.
Seller: jmanceau
No feedback yet
Used$199.97delivered
$199.97 · free shipping
Buy It Now$199.97
This seller takes offers, and many sellers accept less than the asking price.
Fine if you might miss it? Send an offer first. Someone else can still buy it while you wait for a reply.
Want it for sure? Use Buy It Now.
Check the seller
Same title as a zero-feedback seller's listing. Ask for photos of this unit and its serial label.
Seller: ferny111
98.6% positive
Prices change daily. The live eBay search shows everything listed now, including anything new since Oct 15, 2026.
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