When you're in the market for a programmable logic controller (PLC), the first tension is usually new versus used. Do you stretch your budget for a fresh unit, or accept wear in exchange for a lower price? The four controllers here show how that trade-off plays out across a price range from USD 86.97 to USD 180.28.
Quick take
The four listings break into two new Beckhoff options, one used Unitronics, and one new Mitsubishi. At the low end, the Beckhoff EL3064 is priced at USD 86.97 and marked as new. The Unitronics Vision 120 comes in close at USD 89.90 but is used and described as having scuffs and scratches. The Mitsubishi FX1S-20MR-ES/UL is new at USD 102.00, and the Beckhoff BK1120 tops the range at USD 180.28, also new.
Listed price comparison
| Product | Listed price | Price bar |
|---|---|---|
| Beckhoff EL3064 (new) | USD 86.97 | |
| Beckhoff BK1120 (new) | USD 180.28 | |
| Unitronics Vision 120 (used) | USD 89.90 | |
| Mitsubishi FX1S-20MR-ES/UL (new) | USD 102.00 |
Decision matrix
| Product | Condition | Listed price | Who it suits |
|---|---|---|---|
| Beckhoff EL3064 | New | USD 86.97 | Shoppers who want a new controller and the lowest listed price |
| Beckhoff BK1120 | New | USD 180.28 | Buyers specifically after the BK1120 module and comfortable with the top price |
| Unitronics Vision 120 | Used | USD 89.90 | Those fine with a scuffed, pre-owned unit and a 30-day warranty |
| Mitsubishi FX1S-20MR-ES/UL | New | USD 102.00 | Buyers who want a new Mitsubishi controller at a middle price |
Product notes
Beckhoff EL3064
At USD 86.97, this new Beckhoff module is the most affordable entry point among the four listings. Its attributes include the Controller Platform "Automate", so if that matches your system, it's a direct fit. The price alone makes it attractive for a new part, especially if you don't need the extra capabilities that a higher-priced module might bring. One thing to keep in mind is that the Automate platform means the controller is oriented toward that environment, so it's worth confirming that matches your existing setup before committing.
Beckhoff BK1120
The BK1120 is the most expensive option here at USD 180.28, listed as new. If you know your setup calls for a BK1120 bus coupler, this is the listing that matches that model. The model number, new condition, and price are the key facts, so you'll be evaluating fit based on the model name. Choosing it means paying more compared with the other new PLCs in this group, and the payoff is getting that exact BK1120 module without hunting for a different variation. The decision here is straightforward: you either need this specific Beckhoff coupler or you don't, and if you do, the price is the cost of getting it new.
Unitronics Vision 120
At USD 89.90, this used Vision 120 is only about USD 2.93 above the cheapest new option, which puts the cost question right on the edge. The listing describes it as working, with scuffs and scratches, and includes a 30-day warranty. If you're comfortable with visible wear, this gets you into a Unitronics PLC for roughly the same money as the EL3064. The limitation is that it's used and the condition is not pristine, so you're accepting cosmetic damage and potential prior use in exchange for a slightly different brand and model. For a build where appearance doesn't matter, this could be a practical choice.
Mitsubishi FX1S-20MR-ES/UL
Priced at USD 102.00, this Mitsubishi is the middle option: new, in box, and roughly USD 15 above the cheapest listing, while about USD 78 below the BK1120. If you want a new Mitsubishi PLC, this listing offers that at a price between the two extremes. The model number is FX1S-20MR-ES/UL, the condition is new, and the price is USD 102.00. The main reason to pick it is the combination of new status and Mitsubishi brand, while the price sits above the two least expensive options. At this price, you'll want to confirm that the Mitsubishi model matches the requirements of your control system.
Final recommendation
If your priority is the lowest listed price and you want a new Beckhoff controller, the EL3064 is the clear choice. If you're open to a used unit and want to save almost as much, the Unitronics Vision 120 is the only pre-owned listing here, and it comes with the caveat of scuffs and a 30-day warranty. If you specifically need the BK1120 module, you'll be paying the top price of USD 180.28. For a new Mitsubishi unit at a moderate price, the FX1S-20MR-ES/UL at USD 102.00 balances those concerns. Base your decision on whether the model matches your automation setup and whether you accept the new/used trade-off.
