Analysis snapshotSnapshot decision:REVIEW

NASA Stokes 412H-Series Vacuum Pump & Pumping System — Auction Analysis

A probable Stokes Microvac 412H-11 has meaningful rebuilt-market context, but repairable condition, weather exposure, heavy freight, and an unidentified secondary assembly leave no defensible positive blind bid.

Analysis snapshot · Historical — observed August 25, 2026. The scheduled close date of August 27, 2026 has passed. The price, evidence, economics, and recommendation remain exactly as recorded and are not current.

Decision at a glance

RecommendationREVIEW

Maximum hammer bid: $0

Why this decision

REVIEW: probable specialist value does not overcome repair, weather-exposure, and remote-logistics risk without a blank-off test.

What to verify before bidding

Exterior completeness does not establish internal condition or vacuum performance.
The pump is roughly 1,750-lb-class equipment and the secondary assembly adds burden.

Review all risks and unknowns

See costs and maximum bid for the displayed assumptions and buyer-premium treatment.

Snapshot auction state: No bid displayed at observation
Bidders: 0
Blind-model resale: $4,500

Snapshot provenance and timing · observed August 25, 2026 · scheduled close August 27, 2026

GSA Auctions sale 3-1-QSC-I-26-516, lot 006 · Houston, Texas
Snapshot observed August 25, 2026
Scheduled close August 27, 2026
Analysis prepared August 25, 2026
Published August 26, 2026 · page updated September 20, 2026

Prepared and published by Oleksii Udod for LotCaliper.

Continue after this auction

This auction snapshot is historical. Continue with related research, or review a relevant published analysis whose recorded scheduled close has not passed.

Nox T3/T3s + Nonin 3150 BLEScheduled close October 13, 2026 · Same equipment family MTI OTF-1200X Tube FurnaceScheduled close October 2, 2026 · Same equipment family Roche LightCycler 480 II /96Scheduled close October 13, 2026 · Same category

These are individually prepared, time-stamped analyses with recorded scheduled closes. Verify the official auction before acting.

Auction snapshot

At the August 25, 2026 observation, this auction was open with no bid recorded and zero bidders. The observed state remains immutable after close.

A probable model and five-figure rebuilt context do not convert repairable heavy equipment into rebuilt inventory.

Review and correction history

Independent review not recorded for this legacy analysis. No corrections recorded.

View review and correction details

Independent review not recorded

Published before the current independent-review gate; no completed independent review is recorded.

How independent review works

How evidence is classified

Seller facts, photo-derived observations, manufacturer context, unknowns, and LotCaliper assumptions remain explicitly separated.

Source Confirmed

Seller-confirmed

Repairable condition; buyer-handled removal.
No bid recorded at observation.

Photo Derived

Photo-derived

Stokes 412H-series identity; 412H-11 remains probable.
Weather exposure and a second unidentified assembly.

Manufacturer Context

Independent context

The 412H family is a water-cooled rotary-piston vacuum pump; 412H-11-class pumps are 10 HP, roughly 1,750-lb specialist pumps.

Lotcaliper Assumption

LotCaliper assumptions

$4,500 blind gross resale.
$0 blind maximum; secondary assembly contributes $0.

Equipment identity

Laboratory · quantity 1

Stokes Vacuum Microvac 412H-series rotary-piston pump; 412H-11 probable

Identity confidence: High

Identity evidence

Stokes branding, pump architecture, 10 HP-class motor, and water-cooled layout support the 412H family; the unreadable plate keeps 412H-11 probable.
GSA Auctions · Image · observed August 25, 2026

Laboratory · quantity 1

Unidentified Large vacuum-system/support assembly

Identity confidence: Low

Identity evidence

A second large assembly is visible, but manufacturer, model, role, completeness, and function are not established.
GSA Auctions · Image · observed August 25, 2026

Configuration

Stokes pump body, Baldor 10 HP-class motor, belt drive, water plumbing, and oil drain

Confirmed · High confidence

Configuration evidence

Photo-derived configuration.
GSA Auctions · Image · observed August 25, 2026

Exact 412H-11 suffix and current rebuild status

Possible · Medium High confidence

Configuration evidence

The model plate is unreadable and a service sticker is not proof of a rebuild.
GSA Auctions · Image · observed August 25, 2026

Unidentified secondary assembly (assigned $0)

Not established · no source evidence establishes presence or absence

Configuration evidence

Unknown hardware is not monetized.
GSA Auctions · Image · observed August 25, 2026

Condition

As-is / repair risk

Seller-reported repairable condition, visible corrosion/weather exposure, and no blank-off vacuum test.

Evidence confidence: High

Condition evidence

Seller condition and photo-derived exterior observations.
GSA Auctions · Text · observed August 25, 2026

Market evidence

Market evidence strength

Medium High

Public auditability

Limited Legacy

Evidence recency

Not Recorded

No structured comparable-evidence metadata was preserved for this dated snapshot. Public auditability is limited; the numeric resale snapshot cannot be independently audited from comparable records on this page.

Legacy evidence counts were not preserved. Unknown is not reported as zero.

Sensitivity and robustness

Requires Verification

The scenarios show potentially workable economics, but the stated verification gate must be resolved before bidding responsibly.

Blind/as-is model

Max hammer: $0
Gross resale model: $4,500

The $4,875 non-acquisition burden produces no positive blind hammer.

Costs and maximum bid

Transaction / operating cost	Amount	Basis
Selling Fees	$675	LotCaliper assumption: 15% of modeled gross resale.
Shipping	$2,000	LotCaliper pickup, packing, rigging, and inbound-logistics reserve; not a carrier or GSA quote.
Testing Repair Reserve	$700	LotCaliper functional-test and diagnostic reserve.
Risk Buffer	$1,500	Internal pump risk plus the unidentified secondary system.

Buyer premium

Not modeled

Return requirements

$500 minimum profit · 30% minimum ROI

Computed bid constraints

Profit floor: $0

ROI floor: $0

Binding: Profit and ROI floors

Snapshot blind/as-is max hammer

Modeled result at recorded bid

No bid recorded

This is a reseller ceiling, not a prediction of the auction's closing price. Any buyer premium or other unquoted acquisition charge must be deducted before bidding.

Stokes 412H identity, condition, and economics

A service sticker is historical context, not proof of a rebuild. A healthy blank-off test matters more than another dealer asking price.

Verify model plate, motor, oil, cooling circuit, and blank-off vacuum.
Obtain real rigging and freight quotes.

Recommendation and rationale

Snapshot decision

REVIEW

REVIEW: probable specialist value does not overcome repair, weather-exposure, and remote-logistics risk without a blank-off test.

Confidence

Identity: High
Configuration: Medium
Condition: Low
Market Support: Medium High
Costs: Medium

Market support assesses how well the available evidence supports the resale assumption. Exact third-party marketplace records may be omitted when source-use rights are unclear. Each dimension uses the published methodology rubric; a confidence label measures the strength and boundedness of its evidence, not the likelihood of a profitable outcome.

Risks and unknowns

High · Internal Condition Unknown

Exterior completeness does not establish internal condition or vacuum performance.

No mechanical or blank-off test.

High · Heavy Logistics

The pump is roughly 1,750-lb-class equipment and the secondary assembly adds burden.

Official product-family context and lot photos.

Sources

View cited public sources

GSA Auctions API / Data.gov
Official public provenance for auction facts; no unverified direct item URL is invented.
Trillium — Stokes 412H rotary piston pumps
Specialist product-family context; linked and paraphrased.
Stokes Vacuum — Microvac
Official product-family context.