Categories/Computer Peripherals Hard Disks and Modems/UnionSine Desktop External Hard Drive 10TB, USB3.0 3.5" HDD Storage | HD3513 Compatible for PC, Mac, TV, Desktop, Laptop (Black)
healthy

Buy-box price is 12.6% below MSRP and a 2P seller controls the listing

UnionSine Desktop External Hard Drive 10TB, USB3.0 3.5" HDD Storage | HD3513 Compatible for PC, Mac, TV, Desktop, Laptop (Black)

UnionSine Desktop External Hard Drive 10TB, USB3.0 3.5" HDD Storage | HD3513 Compatible for PC, Mac, TV, Desktop, Laptop (Black)

Unionsine·
ID B0F5PR3YKV

The UnionSine Desktop External Hard Drive 10TB, USB3.0 3.5" HDD Storage | HD3513 Compatible for PC, Mac, TV, Desktop, Laptop (Black) was tracked for 31 day(s). During this period, the Buy Box price ranged from $305.99 to $349.99 against an MSRP/MAP of $349.99. The product's pricing health is currently flagged as healthy.

Tracked 31 days · past 30-day window
Last updated Aug 31, 2026

Price Overview

FLOOR PRICE ($)

$305.99

MAX PRICE ($)

$349.99

AVG PRICE ($)

$324.47

EROSION (%)

12.57%

MSRP/MAP ($)

$349.99

Price erosion from MSRP
Moderate12.57% below MSRP
MinimalModerateSevere

The product hit a low of $305.99, following a peak of $349.99 during the tracking period. Compared to its MSRP of $349.99, the floor price reflects a moderate variance of 12.57% erosion.

Tracking window: Aug 1, 2026 – Aug 31, 2026

Buy box distribution

100%2P
2P · 1 seller, 100% share
Sellers won
1 of 1tracked sellers
Changed hands
0 timesover 31 days
SellerConditionPrice vs MSRPBuy box daysErosion
2PAILUO-US· Top
New
$349.99
at MSRP
31d (100%)
0.00%
Erosion severity: green under 10%, yellow 10–20%, red above 20%

The Buy Box for UnionSine Desktop External Hard Drive 10TB, USB3.0 3.5" HDD Storage | HD3513 Compatible for PC, Mac, TV, Desktop, Laptop (Black) is primarily held by AILUO-US (2P) with a 100% share, winning the Buy Box for 31 out of 31 tracked days.

Seller density vs. price erosion

Buy-box priceActive sellersMSRP $349.99
Peak seller pressure1 seller on Aug 1Highest count during tracking window
Price impact at peak−$27.00$349.99 → $322.99
Price trendErodingBased on trailing 30 days
Seller proliferation→ Stable0.0/day avg · 0 net

Buy-box price stayed between $0.00 and $349.99, largely stable over the period. It entered the period already $27.00 below MSRP ($349.99), before any crowding pressure arrived. Seller count peaked at 1 on 08/01 — adding +0 net sellers over the full period. Seller activity and pricing have both been steady — no acute competitive pressure detected.

Seller churn and influx

Comparing sellers before Aug 29 vs last 3 days of 31-day tracking period

New entrants (0)

No new sellers in recent period

Exited (0)

No sellers exited in recent period

Persistent (1)

Key Findings

healthy
Price Erosion

$44.00

Significant12.6% below MSRP

Significant erosion — floor is $44.00 (12.6%) below MSRP; the pricing anchor is under real pressure.

Seller Activity

Clean Channel

CleanStable

No 3P sellers detected — the channel is clean.

Buy Box

AILUO-US

Controlled2P · 31 wins

Buy-box is controlled — AILUO-US (2P) leads with 31 wins at $349.99, and 3P interference is minimal.

Recommended Actions
1

Identify sellers below MAP — The lowest price has dropped to $305.99, which is 12.6% below MSRP ($349.99).

2

Escalate directly with Amazon — The lowest price has dropped to $0.00, which is 12.6% below MSRP ($349.99).

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