Is seint profitable to sell on Amazon United States?

The niche generates $102K/yr across 6 tracked products. 1 of 1 products launched in the last 360 days are still selling. 90-day search growth is -4.5%. Flapen's verdict: Skip it (33/100).

How competitive is the seint niche?

3 brands and 66 sellers compete. The top 5 products take 96% of clicks and top 5 brands hold 100% of demand.

What do buyers complain about in seint?

Top complaints mined from reviews: Color, Durability, Quality-Overall. The return rate is 0.8%.

When does demand for seint peak?

Demand peaks in Aug–Sep; the busiest month runs 2.5× the quietest.

What does it cost to enter the seint niche?

Listings span $5.29–$27.35; the average listing price is $12.38 (sweet spot $15–$100). The average incumbent carries 18,721 reviews — the moat a new listing must climb.

seint

Skip it

Brand-locked demand (top 5 brands take 100% of clicks) — this niche doesn't clear our bar today.

Returns

Incredible0.8%

return rate — above 5% kills the launch gate

Conversion

Good5.3%

search→purchase rate — share of searches ending in a sale

Price range

Good$5.29–$27.35

cheapest to priciest tracked listing — scored on the share inside $15–$100

Avg price

Good$12.38

avg listing price — sweet spot $15–$100

Quality gap

Okay4.5★

avg incumbent rating — lower means beatable quality

Market size

Okay$102K

$102K/yr · 156K searches

Growth

Bad-4.5%

90-day search growth — must beat 0% to launch

Review moat

Bad18,721

avg incumbent reviews — the moat a new listing must climb

Competition

Bad96%

top-5 click share — a locked-up shelf

Brand share

Bad100%

top-5 brand share — brand-locked demand

According to Flapen's Amazon United States niche tracking, seint is a $102K/yr Amazon United States market (156K searches/yr). The top 5 brands hold 100% of demand. Demand peaks in Aug–Sep. Verdict: Skip it — 33/100.

Data updated Jul 22, 2026 · scored weekly · How we score niches

seint market data

Units sold / yr: 6K–8K; avg 750–1,000/product
Revenue / yr: $74K–$99K; units × avg price
Conversion rate: 5.3%
Avg BSR: #100
Page quality: 0%
Prime: 100%
Sponsored: 100%
Out of stock: 0.0%
Avg brand age: 63 months
Avg seller age: 134 days

Competition & brand share

The top 5 products capture 96% of clicks — a locked-up shelf that new listings rarely crack.

Brands

3 rising

Sellers

Top-5 brand share

100%

Top 20: 100%

Top-5 click share

96%

Top 20: 100%

Open market

NYX PROFESSIONAL MAKEUP76%
MAC17%
Kiss7%

Demand & seasonality

Weekly Amazon search volume, last 104 weeks — -4.5% search growth over the last 90 days.

Peak months: Aug, Sep · busiest ÷ quietest = 2.5×

Open Trend

Top seint search terms

nyx nude truffle19K/yr +22.2%1.3% conv.
nyx peekaboo neutral lip liner15K/yr +13.3%14.7% conv.
mac cool spice lipliner17K/yr -5.1%3.1% conv.
nyx truffle lip liner12K/yr -19.8%1.1% conv.
nude truffle10K/yr +13.6%1.4% conv.
nude truffle nyx10K/yr -0.8%1.0% conv.
mac spice lip liner pencil12K/yr -18.0%5.8% conv.
nyx slim lip pencil peekaboo neutral3K/yr +44.5%14.1% conv.
cool spice lip liner mac8K/yr +2.8%2.5% conv.
nyx nude beige7K/yr -26.9%1.2% conv.

All search terms

Top seint products on Amazon

Each bubble is one product — market share against review moat; bubble size tracks estimated sales, color grades how beatable the incumbent looks.

Beatable (≤4.3★) Contested Strong incumbent (>4.7★)

All 6 tracked products in this niche — three views at once, no toggling.

Top sellers

by 90-day click share

NYX PROFESSIONAL MAKEUP Slim Lip Pencil Long-Lasting Creamy Lip Liner - Peakaboo Neutral

NYX PROFESSIONAL MAKEUP$5.744.5★52,571 rev

M.A.C Lip Pencil Spice 1 Count

MAC$24.374.6★570 rev

Kiss New York Professional Slim Long-Wear Lip Liner Pencil Matte Finish

Kiss$5.294.4★738 rev

NYX PROFESSIONAL MAKEUP Slim Lip Pencil Long-Lasting Creamy Lip Liner - Nude Pink

NYX PROFESSIONAL MAKEUP$5.404.5★52,571 rev

MAC Lip Pencil - Cool spice (Deep brown mauve) .05 Oz/ 1.45g

MAC$27.354.7★14 rev

Newest

by launch date

MAC Lip Pencil - Cool spice (Deep brown mauve) .05 Oz/ 1.45g

MAC$27.3514 rev

11mo ago

Kiss New York Professional Slim Long-Wear Lip Liner Pencil Matte Finish

Kiss$5.29738 rev

3y ago

NYX PROFESSIONAL MAKEUP Slim Lip Pencil Long-Lasting Creamy Lip Liner - Peakaboo Neutral

NYX PROFESSIONAL MAKEUP$5.7452,571 rev

8y ago

NYX PROFESSIONAL MAKEUP Slim Lip Pencil Long-Lasting Creamy Lip Liner - Nude Pink

NYX PROFESSIONAL MAKEUP$5.4052,571 rev

8y ago

NYX PROFESSIONAL MAKEUP Suede Matte Lip Liner Velvety-Smooth Long-Lasting Formula For A Defined Lip Makeup Look - Sandstorm (Brown)

NYX PROFESSIONAL MAKEUP$6.115,862 rev

9y ago

What buyers say about seint

What buyers praise and complain about, mined from review topics.

What buyers love

Color32%

“Love the color”

Soft Feel11%

“its super creamy”

Quality-Overall11%

“Overall, it's still a really nice lip liner for the price and finish”

Value For Money8%

“Good bang for your buck”

Coverage7%

“Great coverage”

Durability7%

“lasts a long time”

Texture/Consistency-Overall5%

“Great texture, goes on so smooth and even”

Ease Of Use4%

“Just as easy as purchasing at the MAC Store”

Eyeliner Quality3%

“Pretty color I use it as eyeliner for my waterline”

Ease Of Application3%

“It applies easily”

What buyers complain about

Color46%

“shade is too dark”

Durability8%

“Doesnt last”

Quality-Overall7%

“Not the best”

Advertised Vs Actual Product7%

“does not appear as described”

Thickness7%

“My villainously thin lips have been fixed”

Moist/Dry6%

“The desert in a stick, dry, difficult to apply to lips”

Allergies3%

“allergic to it”

Hard Feel2%

“you have to press so hard with the NYX”

Top return reasons

Color67%

Advertised Vs Actual Product9%

Moist/Dry6%

Ease Of Application2%

Value For Money2%

Functionality-Overall2%

Quality-Overall2%

Hard Feel1%

Product Condition1%

Weight Light1%

Common questions

Is seint profitable to sell on Amazon United States?: The niche generates $102K/yr across 6 tracked products. 1 of 1 products launched in the last 360 days are still selling. 90-day search growth is -4.5%. Flapen's verdict: Skip it (33/100).
How competitive is the seint niche?: 3 brands and 66 sellers compete. The top 5 products take 96% of clicks and top 5 brands hold 100% of demand.
What do buyers complain about in seint?: Top complaints mined from reviews: Color, Durability, Quality-Overall. The return rate is 0.8%.
When does demand for seint peak?: Demand peaks in Aug–Sep; the busiest month runs 2.5× the quietest.
What does it cost to enter the seint niche?: Listings span $5.29–$27.35; the average listing price is $12.38 (sweet spot $15–$100). The average incumbent carries 18,721 reviews — the moat a new listing must climb.