The Catalyst 3750-X was Cisco's stackable layer 3 access switch when it came out in March 2010. The 48P-S has 48 gigabit PoE+ ports, StackWise Plus for stacks of up to nine switches at 64 Gbps, and StackPower to share power across up to four. Its uplinks come from a module that isn't part of the default switch. The C3KX-NM-1G gives four gigabit ports and the NM-10G gives two 10G SFP+, so the module in the photos matters. PoE depends on the supply. The 715 W unit it ships with gives 435 W, and two 1100 W supplies reach 1600 W. The -S is IP Base, and IP Services was a separate license. Home-labbers buy it for stacking, routing and real PoE on one platform. It draws about 134 W before PoE and Cisco rates it at 43 dB typical, so it suits a garage more than a desk. Support ended in October 2021.
Lab 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.
Most trouble is missing parts. The power supplies, fans and network module are all field-replaceable, so check the photos for what's fitted and what's a blank.
Buying your first used switch or router? How to check used network gear covers the console, a factory reset, power supplies and optics, and our noise and power guide covers what fans and power draw mean at home.
Buying guide
We'd buy netyorker's seller-refurbished 3750X-48P-S with the C3KX-NM-10G module at $110 delivered for its two 10G SFP+ uplinks, or juluplus's one with two 715 W supplies and an NM-1G at $90 if you'd rather have 870 W of PoE than the single supply's 435 W. There are at least 69 for sale, most asking $90 to $200 delivered depending on what's fitted, so check the photos for the 715 W supply, the second bay and the uplink module, and skip ace_systems_usa's $2,400 manufacturer-refurbished one at twelve times the top of the band. The -S is IP Base, and Cisco's transfer policy means the installed license is the one you can count on, so treat any IP Services claim as the seller's word. Support ended in October 2021 and Cisco rates it at 43 dB typical, so it suits a garage or rack better than a desk.
$63.20est. delivered
The lowest delivered WS-C3750X-48P-S titled with its 715 W supply, which gives 435 W of PoE, and it carries a 3-month warranty from a 100% seller in Canada. The title names no network module, so ask what's in the uplink slot and the second bay.
Cisco 3750X Managed POE+ Switch WS-C3750X-48P-S with 715WAC PS 3 Months Warranty
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$63.20est. delivered
$35.11 + $28.09 shipping
Buy It Now$35.11
Good buy
Titled with the 715 W supply and a 3-month warranty. Ships from Canada.
Seller: router.switch.expert
100% positive
Used$71.55est. delivered
$49.00 + $22.55 shipping
Buy It Now$49.00
This seller takes offers, and many sellers accept less than the asking price.
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Our take
Titled no power supply, so it needs a C3KX-PWR-715WAC before it will power on.
Seller: ashmesh_0
99.3% positive
Used$88.74est. delivered
$69.99 + $18.75 shipping
Buy It Now$69.99
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.
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Our take
Titled with a power supply and rack ear. No module named; ask what's in the uplink slot.
Seller: fallfax-surplus
99.7% positive
Used$90.00delivered
$90.00 · free shipping
Buy It Now$90.00
Our take
Titled with dual 715 W supplies, good for 870 W of PoE, and the C3KX-NM-1G. Free shipping.
Seller: juluplus
99.2% positive
Used$105.22est. delivered
$74.99 + $30.23 shipping
Buy It Now$74.99
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.
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Our take
V02, titled with the C3KX-NM-1G. No supply named; ask.
Seller: buffalocr2012
99.7% positive
Used$108.90delivered
$108.90 · free shipping
Buy It Now$108.90
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
Free shipping. The seller's graphic lists a supply, rack ears, console cable and blank and says tested and reset; the title doesn't, so ask.
Seller: netrenew
100% positive
Refurbished$109.99delivered
$109.99 · free shipping
Buy It Now$109.99
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
Refurbished card, titled with the C3KX-NM-10G. Photo shows a power cord and console cable.
Seller: netyorker
99.9% positive
Refurbished$2,400.00delivered
$2,400.00 · free shipping
Buy It Now$2,400.00
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.
Priced high
Manufacturer-refurbished with a 1-year warranty, at twelve times the top of the band. Photo shows a boxed unit.
Seller: ace_systems_usa
100% positive
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