The lowest quote is rarely the cheapest order
I'll say the thing that makes most procurement managers uncomfortable: the quote you pick based on unit price alone is usually the one that costs you the most by the time it's paid off.
Not always. But often enough that I stopped trusting price-first sourcing somewhere around 2019 and never went back.
I've been buying industrial control components for a system integrator for eight years — relays, PLCs, safety PLCs, VFDs, contactors, timers. In that time I've personally pushed through procurement on maybe 1,400 line items, and I've made at least fourteen mistakes that were expensive enough that I wrote them down afterward. The running estimated total is somewhere around $6,500—$7,000 in wasted budget. I'd have to pull the old files to confirm; part of it got charged to project overhead and I never isolated the exact number.
What I do have is a pre-order checklist that my team now uses on every automation component purchase. This article is essentially that checklist, expanded.
What I actually believe about pricing
I believe transparent pricing beats hidden pricing. Every time, on every category — relay modules, PLC wholesale orders, drive sourcing, timer distribution. The vendor who tells me upfront that there's a $45 handling fee, a 5-day lead time, and a minimum of 10 pieces is more useful to me than the one who quotes 8% less and lets me discover the rest at invoice time.
That's the position. Below are the three arguments that got me there, and the mistakes that made each one stick.
Argument 1: Extra line items wipe out low unit prices
In early 2019 I was pushing through a Phoenix Contact relay purchase for a small panel build — around 60 units, mixed 24VDC coil modules and DIN-rail bases. I collected four quotes. Three landed within about 6% of each other. The fourth came in roughly 12% below the average, and I picked it without asking a single follow-up question.
Six weeks later the project accounting closed. That order had cost 31% more than the middle quote would have. The extra came from things that were never on the original sheet:
- A "small order handling fee" that appeared once the invoice was generated
- Shipping split into two shipments because the stock wasn't actually all on hand
- A minimum-order-value clause that bumped the quantity up without anyone telling me
- Three weeks of back-and-forth emails confirming specs that should have been in the quote
I knew I should ask for the all-in number before confirming, but I thought "what are the odds this one has fees the others don't?" Well — the odds caught up with me. I still kick myself for not asking the obvious question first.
After that, I went back and reconciled about 30 purchases from the previous 12 months, comparing base quote to final landed cost. The pattern was consistent: the lowest base quote was, more often than not, not the lowest total. I won't claim that's a universal rule from a sample of thirty. But it changed how I read quotes.
What I ask now, every time:
- Is this price landed, or before freight, handling, and tax?
- Do I need to hit a minimum order value or quantity for this price to apply?
- Are bases, clips, and end plates included, or priced separately?
- What's the lead time as written, not as promised?
Argument 2: 24VDC relays are where spec errors get expensive
The Phoenix Contact relay failures I've personally caused weren't relay failures. They were matching failures — base, coil, contact configuration, and terminal type not lining up.
In 2021, we ordered 120 relay modules for a project — all 24VDC coil, all from the same family. What I didn't do was verify the base part numbers against the relay part numbers, because the model names looked "close enough." They weren't. The bases arrived compatible with a different coil voltage spec in the same family. We caught it at the panel build stage, which is better than at the customer site, but still cost roughly nine hundred dollars in return shipping, paperwork, and re-ships, plus a full week of schedule slip.
Since then, my rule when sourcing any phoenix contact relay 24vdc order: the request for quote always includes the complete assembly — relay, base, clip, end plate — with part numbers written out, not family names. I don't accept "you'll figure out the base" from vendors. If they can't confirm the mated set, they don't get the PO.
This is the argument most experienced buyers already know. It's still the one that costs the newest buyers the most, because the price difference between "relay only" and "relay + base" looks small in the quote and turns huge in the re-ship.
Argument 3: Lead time is not a verbal agreement
I'll admit this one still stings. In September 2022 we needed a set of VFDs urgently for a customer retrofit. I called the supplier, confirmed "next Wednesday" on the phone, and processed the order on that basis. In my defense: we'd worked with that supplier for over three years and they'd never missed a date.
The drives didn't arrive Wednesday. Or Thursday. Or Friday. They arrived the following Monday, 5 days after the verbal commitment, with no written change of date anywhere — because there never was a written date to change.
I knew I should have gotten written confirmation. I thought "we've worked together for years." That was the one time it mattered.
The drives themselves were about $4,200. The delay cost us two nights of overtime, a very uncomfortable call with the customer, and a written incident report I had to author explaining why the deadline slipped. If the delivery date had been on the PO, we'd at least have had a leg to stand on.
Today every order I place carries: (a) a confirmed ship date, (b) a confirmed arrival date, (c) a stated penalty or re-ship clause if the date slips. I've had vendors push back on (c). That's fine — I just take the business elsewhere.
The obvious pushback: "but we need the lowest price"
I hear this. Budgets are real. I've had years where I had to shave every dollar off every order, and I did it. So I'm not going to pretend transparent pricing is always the same thing as the cheapest price.
But here's the thing I've learned:
If you only ask one supplier for a quote, you're not getting the lowest price. You're getting the first price from someone willing to answer your email.
Transparent pricing doesn't mean "always pick the expensive vendor." It means picking based on the full number — base, freight, handling, minimums, return cost, and lead-time risk — instead of the top-line number that fits neatly in a spreadsheet cell.
I've watched a $40-savings-per-unit quote turn into a $600 loss after a partial re-ship. I've also watched a slightly-pricier vendor walk a delayed drive order onto our dock a day early without being asked. Those aren't symmetrical, and pretending they are just because the line items look the same on paper is how you end up explaining a slipped project to your own customer.
My position, restated
When you buy a Phoenix Contact relay, a PLC wholesale batch, a drive, or a timer distribution order, you're really buying certainty: certainty that the specs match, certainty that the date holds, certainty that the final invoice matches the quote you approved.
I'm not against low prices. I'm against low prices that come with a second, hidden invoice afterward. That's the whole argument.
So before you approve the next automation component PO, ask three questions — and get the answers in writing:
- What's actually included in this price? Bases, clips, freight, handling, tax, minimum charges.
- What's the confirmed ship date and arrival date? On the order confirmation, not on the call.
- If a spec is wrong, what's the return path? Who pays the freight, how long does the credit take, and does the replacement re-ship at the same price?
Those three questions take about five minutes to ask. Not asking them cost me somewhere north of six thousand dollars and about a week of my life I'd rather have back.
The vendor who answers those three questions clearly — even if the number is 5% higher — is, more often than not, the vendor who saves you money.
