HP launched the 48 series with the 48SX in 1990, and the G models of 1993 made it friendlier: input forms instead of bare stack commands, 3D plotting, and much of HP's Equation Library built in. The 48G is the base model, with 32 KB of memory and no card slots, running RPL, HP's programming language built on RPN, with symbolic math and units. A serial port and infrared link let it talk to a computer, which is how owners shared programs. HP sold it for ten years, to 2003, and it borrows its design from the HP-18C and HP-28. If you want room to grow, the 48GX has four times the memory and two card slots.
Good forEngineering
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.
Few documented faults. Use the built-in self-test to check the screen and keys, and make sure it's a 48G, not a G+ or GX.
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
We'd buy the 48G titled tested and working with a case at $102 delivered, at the bottom of the $100-140 band most working ones ask. There are at least 28 for sale, and a 48G with its case and both user guides asks about $172 delivered. Check the face reads 48G, since a 48G+ has 128 KB and a 48GX has two card slots on the back, and treat the one titled 48G with 128K RAM as a likely 48G+ until the seller says which. Ask the seller to run the ON and D self-test through to KBD1 OK, and for a photo of the screen with no dead lines.
$70.00delivered
The lowest delivered 48G titled working, an auction at $70 with free shipping and no bids yet, so it will climb. The photo shows only a zipped case, so ask for a photo of the calculator switched on.
Hewlett Packard HP 48G Graphing Calculator Works Great!
$102.09est. delivered
Titled tested and working with a case, at $102 delivered from a 100% seller, at the bottom of the band. Ask for the KBD1 OK result from the self-test before you pay.
Hewlett Packard HP 48G Graphing Calculator 32k Ram With Case Tested Working
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$70.00delivered
$70.00 · free shipping
Auction · no bids yet · ends in 2d 13h
Good buy
Titled works great. Photo shows only a zipped case. Auction with no bids, so it will climb.
Seller: heliossteeds
100% positive
Used$102.09est. delivered
$95.00 + $7.09 shipping
Buy It Now$95.00
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.
Good buy
Titled tested and working, 32K, with a case. Photo shows it switched on.
Seller: crackston
100% positive
Used$103.48est. delivered
$95.00 + $8.48 shipping
Buy It Now$95.00
Our take
Titled tested and clean. Photo shows it beside an HP zip case.
Seller: spooln30
100% positive
Used$115.13est. delivered
$107.00 + $8.13 shipping
Buy It Now$107.00
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 tested, 32K. Photo shows it switched on.
Seller: likenwhatido
99.7% positive
Used$171.71est. delivered
$148.00 + $23.71 shipping
Buy It Now$148.00
Our take
Titled works, with a hard case and two user manuals.
Seller: nightwind
100% positive
Used$113.45est. delivered
$100.00 + $13.45 shipping
Buy It Now$100.00
Check the seller
Titled 48G with 128K, which fits a 48G+. Ask which model it is.
Seller: hp41calcfan
100% positive
Used$138.00est. delivered
$109.00 + $29.00 shipping
Buy It Now$109.00
Check the seller
One of several numbered copies from a 95.9% seller. Ships from France for $29.
Seller: relojado
95.9% positive
Used$172.51est. delivered
$164.99 + $7.52 shipping
Buy It Now$164.99
Check the seller
No seller shown. Titled with a case and user guides, and the photo shows both.
Seller: Seller on eBay
Check feedback on the listing
Prices change daily. The live eBay search shows everything listed now, including anything new since Oct 15, 2026.
See every listing on eBay ↗eBay searchHP
Graphing$230–$340 typical ask
HP
Graphing$80–$140 typical ask
HP
RPN scientific$190–$260 typical ask