The SRX300 is the smallest model in Juniper's SRX300 line of branch firewalls, which Juniper's licensing groups with the SRX320, SRX340, SRX345 and SRX380. It's a fanless desktop box with six gigabit ports, two SFP ports, 4 GB of memory and 8 GB of flash. Juniper rates it for up to 1 Gbps of firewall traffic and 300 Mbps of IPsec VPN, and it supports IDP, MACsec on the SFP ports and high availability. For a home lab, the appeal is that it's silent and averages about 25 W. It also runs the same current Junos as Juniper's bigger SRX firewalls, so JNCIA and security students can practice policies, NAT and IPsec on it. Juniper hasn't announced end of life for the hardware. Security subscriptions are tied to the serial number, so buy it for what the Standard tier does.
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.
Holding the front RESET CONFIG button wipes every config, so ask whether the seller changed it with set chassis config-button. Most other trouble is the previous owner's config and a missing power adapter.
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 explains why fanless gear suits a living space.
Buying guide
We'd buy dawson-electronics' SRX300 titled tested at $187 with free shipping from China, under the $229 median, after asking whether the 12 V adapter comes with it. There are at least 73 for sale, and most used units ask $150–390 delivered. Bare units titled without the adapter start at $72 delivered, while corelinksystems' UK unit with the SRX300-RMK0 rack kit and PSU asks $195, so price Juniper's 60 W, 12 V adapter into any listing that doesn't show one. It's fanless and still supported, but security subscriptions are tied to the chassis serial, so plan on the Standard features whatever bundle code the title carries. Skip vaa666's SRX300-JSE at $2,627 delivered, more than 11 times the median.
$71.68est. delivered
The lowest delivered SRX300 here, and the photo shows the right six-port, two-SFP front. It's titled NO Adapter and makes no test claim, so add Juniper's 12 V, 60 W adapter to the price.
Juniper Networks 8 Port Security Service Gateway Firewall SRX300 / NO Adapter
$187.00delivered
Titled tested, under the $229 median with free shipping, and the photo shows the six-port, two-SFP front. Neither the title nor the photo shows the 12 V adapter, so ask before you buy.
Juniper Networks SRX300 6-Port Security Services Gateway Firewall Switch Tested
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$71.68est. delivered
$54.99 + $16.69 shipping
Buy It Now$54.99
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.
Good buy
Titled NO Adapter. Needs Juniper's 12 V, 60 W adapter. Not titled tested.
Seller: techredosurplus
99.9% positive
Used$187.00delivered
$187.00 · free shipping
Buy It Now$187.00
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, ships free from China. No adapter in the photo; ask.
Seller: dawson-electronics
99.2% positive
Used$94.99est. delivered
$74.99 + $20.00 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.
Want it for sure? Use Buy It Now.
Our take
Titled SRX300-SYS-JB. No adapter or test claim in the title.
Seller: randtunsi0
99.7% positive
Used$194.61est. delivered
$127.11 + $67.50 shipping
Buy It Now$127.11
Our take
Titled with the SRX300-RMK0 rack kit and PSU. Ships from the UK.
Seller: corelinksystems
100% positive
Used$197.92est. delivered
$165.00 + $32.92 shipping
Buy It Now$165.00
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 SRX300-SYS-JB. Ask whether the adapter is included.
Seller: quantumtechnologyinc
100% positive
Used$229.99delivered
$229.99 · free shipping
Buy It Now$229.99
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
Plain SRX300 title from a US surplus seller. No adapter or test claim in the title.
Seller: netyorker
99.9% positive
Used$260.95est. delivered
$149.88 + $111.07 shipping
Buy It Now$149.88
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 and $111 shipping as another seller's listing. Ask for a photo of this unit's label.
Seller: broadlot
98.9% positive
Used$2,627.48est. delivered
$2,426.65 + $200.83 shipping
Buy It Now$2,426.65
Priced high
SRX300-JSE from an Austrian reseller with a 3-year warranty. Photo is a warranty graphic.
Seller: vaa666
99.5% positive
Prices change daily. The live eBay search shows everything listed now, including anything new since Oct 15, 2026.
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