When you're building or extending an industrial control network, the switch is the quiet part that keeps everything connected. The decision gets harder when you're not looking for a rack of enterprise gear but for a single, affordable unit that fits an industrial networking fieldbus environment. The N-TRON 708TX Industrial Ethernet Switch, listed as used at USD 34.99, is that kind of focused choice.
Quick verdict
If your priority is a low-cost way to add an Ethernet switch to an automation network, this is a reasonable pick. The N-TRON 708TX is a straightforward industrial switch from N-Tron, and the pre-owned condition explains the modest price. You're not getting a new unit; you're getting a practical option for projects that can accept pre-owned hardware. If your facility requires new components for every install, this is not the switch for that situation.
Who it suits
This switch suits engineers and technicians who need communication between PLCs and HMIs without the cost of a new unit. If your priority is getting PLCs and HMIs onto the same Ethernet network, this switch is aimed squarely at that task.
What stands out from the listed details
The N-TRON 708TX is an N-Tron industrial Ethernet switch with the model number 708TX. The product is positioned for industrial automation and motion-control systems, which makes the intended use clear. The automation-focused positioning sets that expectation. The condition is used, so it's clearly a pre-owned component.
N-TRON 708TX Industrial Ethernet Switch

Choose it for the direct fit: it's an industrial Ethernet switch built for PLC and HMI communication, and the $34.99 price keeps the cost low for a used unit. The limitation is the condition-this is a pre-owned switch, not a new one-so it suits buyers who are comfortable with used industrial hardware. That trade-off is central to the buying decision.
Meaningful trade-offs
The main trade-off is the condition. A pre-owned switch can be a smart way to keep costs down, but it is not a new component. For a project that can accept pre-owned hardware, the lower upfront cost is the draw; for a project that requires new equipment, this unit is not the right fit. The condition is clear, so there is no ambiguity about what you're getting.
Bottom line
If you need a low-cost Ethernet switch for an industrial networking fieldbus setup and you're okay with pre-owned hardware, the N-TRON 708TX is worth a closer look. It delivers the essential switching role at a low price and leaves the main decision up to you: whether pre-owned is acceptable for your application. If pre-owned hardware is off the table, this switch is not for you; if it's not, the low price makes it an easy unit to justify.