What finishes are available for these Neumann microphones?

The finishes seen for the KM140, KM100, and AK40 models include Gris Oscuro.

What is the current price range for these used Neumann models?

The used range for the Neumann KM140, KM100, and AK40 is between $773.22 and $1,011.13.

How many listings are currently available for these specific Neumann models?

Based on the available data, there are 2 listings for the Neumann KM140, KM100, and AK40.

Neumann KM140; KM100; AK40 — Unit Resale Value

Name: Neumann KM140; KM100; AK40 — Unit Resale Value
Brand: Neumann

Pro Audio

What a used Neumann KM140; KM100; AK40 sells for on Reverb (median of 2 recent listings).

Neumann KM140; KM100; AK40 value — Used $1,011. Prices updated July 2026.

Used

$1,011

New / Sealed

—

Live on eBay now

See current eBay listings

Selling on eBay right now · by condition

New

$564

8 listings asking

Used

$1,599

12 listings asking

Median of current eBay asking prices — live, not sold data.

Live on eBay right now

Expired listings — price reference

Neumann KM 184 Cardioid Condenser Microphone Matte Black Brand New in Box~~$779.99~~Newexpired · seen Jul 30Look up ↗

Neumann KM 184 MT Professional Wired Stereo Set~~$900~~Open boxexpired · seen Jul 30Look up ↗

NEW Neumann KM 184 MT Professional Wired Stereo Set~~$920~~Open boxexpired · seen Jul 30Look up ↗

US Neumann KM 184 Stereo Set Small-diaphragm Cardioid Microphone~~$550.99~~Newexpired · seen Jul 30Look up ↗

NEUMANN KMi 84 Condenser Microphone Serial No.61482 Original Working & Tested JP~~$1,924.99~~Usedexpired · seen Jul 30Look up ↗

Used NEUMANN KMi 84 Neumann Condenser Microphone Germany Very Rare Item~~$2,699~~Usedexpired · seen Jul 30Look up ↗

eBay removes ended listings after ~90 days — we keep the prices. Look up finds current listings for the same item.

JunkPal AI· resale insightanalyzing sold comps…

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Price data verified against · 1

Reverb — Neumann KM140; KM100; AK40 (used listings)$1,011

Item details

Brand: Neumann
Make: Neumann
Model: KM140; KM100; AK40
Finishes seen: Gris Oscuro
Used range: $773.22 – $1,011.13
Sample size: 2 listings

Neumann KM140; KM100; AK40 resale value

The used Neumann KM140; KM100; AK40 has a median Reverb asking price of $1,011.13, ranging from $773.22 to $1,011.13 across 2 current listings.

What drives the price

For a used unit, channel count, working metering, and whether it's a sought-after vintage piece move the price most. Vintage and limited runs command a premium; player-grade and modified examples sell for less.

Price guide

What this actually trades for — sold values by condition vs. what sellers are asking today

Shop this on eBay ↗

Condition	Value	Based on
Used	$1,011	eBay sold comps
Live asking — low / typical / high	$419.99 / $900 / $7,471	20 live eBay listings ↗

Market check: As of July 29, 2026, 20 live eBay listings ask $419.99–$7,471.00 (median $900.00). Asking prices sit about 11% below the typical sold value of $1,011.13 — a window worth checking for buyers.

Frequently asked questions

What finishes are available for these Neumann microphones?: The finishes seen for the KM140, KM100, and AK40 models include Gris Oscuro.
What is the current price range for these used Neumann models?: The used range for the Neumann KM140, KM100, and AK40 is between $773.22 and $1,011.13.
How many listings are currently available for these specific Neumann models?: Based on the available data, there are 2 listings for the Neumann KM140, KM100, and AK40.