Average Listing Age (days), Mercari

Average Listing Age (days) for Mercari stores. Tracked live in Vortex IQ Nerve Centre. How to read it, why it matters, and how to act on it.

Metrics type: Key Metrics • Category: Marketplace

At a glance

Average Listing Age (days) is the mean age of your active Mercari listings. It is a freshness gauge: Mercari’s search boost decays sharply after about a week, so a rising average warns that much of your catalogue has gone stale and needs re-listing.

What it counts	The average number of days your currently active listings have been live on Mercari.
Sample type	Backend API data from Mercari, refreshed on the standard data refresh.
Why it matters	Mercari’s freshness boost lifts newly listed items in search and fades quickly after roughly 7 days. A high average means your listings are no longer riding that boost, which suppresses views and sell-through.
Reading the value	Lower is generally healthier. A value drifting above about 14 days signals that the boost has worn off across the catalogue and a re-listing cadence is overdue.
Currency	number
Time window	RT
Alert trigger	>14d (freshness eroded)
Sentiment key	mer_avg_listing_age
Roles	owner, marketing

Calculation

The card takes each active listing’s days-since-listed and averages across the full set of live listings. It is evaluated in real time against the current date, so the average climbs steadily as listings sit unsold and resets downward whenever you re-list or add fresh items. A few very old listings can pull the average up even when most of the catalogue is recent.

Worked example

A representative reading of Average Listing Age (days) for a typical Mercari reseller. Suppose, illustratively, your average listing age has crept to 19 days and the alert fires on >14d. The 7-day freshness boost has long faded for most of your catalogue, so views have softened even though prices are fair. The action is to re-list or refresh the oldest items in batches to re-enter the freshness window, rather than waiting for them to expire. Cross-reference mer_listings_expiring to see what is about to lapse anyway and mer_listings_active to size the catalogue you are refreshing. Vortex Mind traces the upstream cause, for example a cohort of listings created months ago that never sold, and Ask Viq answers plain-English questions like “which listings are dragging my average age up”.

Sibling cards merchants should reference together

Card	Why merchants reach for it
mer_listings_active	Size the catalogue the average is computed across.
mer_freshness_boost	See how many listings are still inside the search-boost window.
mer_listings_expiring	Catch ageing listings before they lapse so you can re-list.
mer_listing_quality_score	Old age plus weak quality is the worst combination for visibility.
mer_total_listings	Compare the active set against your full listing base.

Reconciling against Mercari

Where to look in Mercari’s own dashboard:

Mercari does not publish a single average-age figure, but you can sanity-check it in the app or web by sorting your active listings by date listed. The oldest items at the top, against the newest, give you a feel for the spread the average summarises.

Why the Vortex IQ value may legitimately differ:

Reason	Direction	What to do
Period boundary. Re-listing resets an item’s age on Mercari; a recent re-list may show younger here than you expect.	Variable	Match the period range.
Time zone. Age is measured in whole days, so a listing created late in the day can read a day older or younger depending on time zone.	Marginal	Confirm time zone match.
Filter scope. Profile filters can include or exclude listing states (draft, sold) that change the active set.	Variable	Match filter settings.

Cross-connector reconciliation: this counts Mercari listing age only; the same item listed elsewhere has its own, separate clock. For divergence investigations, use Vortex Mind.

Known limitations / merchant FAQs

Q: How often does Average Listing Age (days) update? It is evaluated in real time on each standard data refresh and recalculated against the current date, so the average nudges up daily until you re-list or add fresh stock.

Q: Why does my Mercari dashboard show a different number? Mercari shows each listing’s individual date rather than a catalogue average, and re-listing resets an item’s age. Differences usually come from how re-lists are counted and from which listing states are included.

Q: Does re-listing actually lower the average? Yes. Re-listing resets the affected items’ age, which pulls the average down and, importantly, re-enters those items into the 7-day freshness boost in search.

Q: Can I customise the alert threshold? Yes, alert thresholds are configurable per profile in the Alert Rules tab. Adjust to match your business baseline rather than relying on the generic default.

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Tracked live in Vortex IQ Nerve Centre

Average Listing Age (days) is one of hundreds of KPI pulses Vortex IQ tracks across Mercari and 70+ other ecommerce connectors. Nerve Centre runs the detection layer; Vortex Mind investigates the cause when something moves; Ask Viq lets you interrogate any number in plain English.

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