Miller Big 400 Pro machine auction prices

As of 6 November 2026, hammerhistory.com has recorded 6 auction sales of the Miller Big 400 Pro machine with a published hammer price, closed between 20 October 2026 and 4 November 2026, on 2 auction sites in 1 country. One sale is free to read: a 2024 Miller Big 400 Pro machine sold for USD 14.500 on 20 October 2026. 2 are at auction now.

Known on 2 auction sites 6 sold with a price 2 at auction now 12 seen at auction

5 hammer prices are locked. See what every Miller Big 400 Pro really sold for and know a fair price before you bid. Pay once, open at once, new sales included for a year.

EUR 39one payment, a year of sales

Everything, EUR 129 a month EUR 1,290 a year Every price on the site. Cancel any time.

All sales 6

Sold	Built	Hours	Auction house	Place	Photos	Hammer price
2026-10-20 2024 Miller Big Blue 400 Pro 300 A Multi-Process Engine Driven Welder	2024	unknown	rbauction.com	West Fargo, ND, USA, US	1	EUR 13.000USD 14.500 FREE
2026-11-04 2015 Miller Big Blue 400 Pro 400 A Mobile Multi-Process Engine Driven …	2015	unknown	Auction house	US	1	in the report
2026-10-20 2023 Miller Big Blue 400 Pro 300 A Multi-Process Engine Driven Welder	2023	unknown	Auction house	US	1	in the report
2026-10-20 2024 Miller Big Blue 400 Pro 300 A Multi-Process Engine Driven Welder	2024	unknown	Auction house	US	1	in the report
2026-10-20 2023 Miller Big Blue 400 Pro Skid-Mounted Multi-Process Engine Driven …	2023	unknown	Auction house	US	1	in the report
2026-10-20 2024 Miller Big Blue 400 Pro 300 A Skid-Mounted Multi-Process Engine D…	2024	unknown	Auction house	US	1	in the report

Click a sale to see that machine with its photos and details. 4 more closed without a sale. A hammer price under EUR 100 is free to read.

At auction now 2

2017 Miller Big Blue 400 Pro 400 A Mobile Multi-Process Engine Driven Welder

rbauction.com · Lake Worth, TX, USA

No price startcloses 2026-11-18

2020 Miller Big Blue 400 Pro 400 A Mobile Multi-Process Engine Driven Welder

rbauction.com · Lake Worth, TX, USA

No price startcloses 2026-11-18

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Miller Big 400 Pro

Welding and soldering equipment

The Miller Big Blue 400 Pro is a trailer or skid mounted engine driven welder generator, built around a diesel engine delivering up to 400 amps of multi process welding power along with auxiliary AC power output. It is aimed at heavy fabrication, pipeline and construction work where mobile welding and generator capacity are both needed. It sits near the top of Miller's Big Blue engine driven welder range, prized for durability and continuous duty output.

Built

since 2015

Replaced

Big Blue 400X

We recognise this model across the auction sites and keep every one we see together.

On a used one

Check hours on the engine and welder, look for oil leaks, worn wiring and corroded terminals, and ask about maintenance history of the diesel engine and the condition of the generator windings.

About Miller

Miller Electric is an American maker of arc welding equipment, building MIG, TIG and stick welders, plasma cutters and engine driven welder generators such as the Bobcat and Big Blue ranges. It is part of the Illinois Tool Works group.

Founded 1929 · Appleton, United States · Part of Illinois Tool Works

All Miller models

6sold with a price

2at auction now

2auction sites

1countries

5 more hammer pricesin the report · EUR 39 once

sold, price lockedfree to read

Questions about Miller Big 400 Pro auction prices

How many Miller Big 400 Pro auction sales are on record?

6 sales with a published hammer price, closed between 20 October 2026 and 4 November 2026, on 2 auction sites in 1 country. 4 more closed without a sale.

Is a Miller Big 400 Pro at auction now?

2 machines of this model are at auction now; they are listed on this page with their current bid and when they close.

Are the Miller Big 400 Pro hammer prices free to read?

The oldest sale of every model is free to read, and so is every hammer price under the site's floor. The other 5 hammer prices of the Miller Big 400 Pro open with an account: every sale of the model for a year, or one sale on its own.

Hammer prices are what the auction house recorded when the lot closed, before the buyer's premium, in the currency of the sale. A sale listed on a house's own site and on its platform counts once. Doubt a figure? Open the sale and its listing is linked there. How prices are recorded.