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

Market size 18Growth 29Conversion 100Competition 9Returns 96Price range 71Avg price 79Brand share 0Review moat 87Quality gap 17

Conversion

Incredible21.4%

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

Returns

Incredible0.9%

return rate — above 6% kills the launch gate

Review moat

Great250.88

avg incumbent reviews — the moat a new listing must climb

Avg price

Great$16.68

avg listing price — sweet spot $15–$100

Price range

Good$12.00–$22.51

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

Growth

Okay+3.3%

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

Market size

Bad$73K

$73K/yr · 21K searches

Quality gap

Bad4.7★

avg incumbent rating — lower means beatable quality

Competition

Bad89%

top-5 click share — a locked-up shelf

Brand share

Bad100%

top-5 brand share — brand-locked demand

Competition

The top 5 products capture 89% of clicks — a locked-up shelf that new listings rarely crack.

Brands

5 flat

Sellers

50

Top-5 brand share

100%

Open market

0%

  • NGK62%
  • Quad Logic22%
  • Polaris7%
  • AULINK6%
  • OVERSTOCKDIRECT3%

Product shelf

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

0%10%$7K20%$15K30%$22K40%$29K101001K10K Reviews — right = deep review moat Market share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)

All 8 tracked products in this niche — three views at once, no toggling.

Demand

Weekly Amazon search volume, last 27 weeks — +3.3% search growth over the last 90 days.
500300Spike '26Jan '26Feb '26Mar '26Mar '26Apr '26May '26Jun '26

Reviews

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

What buyers love

Socket/Port/Plug33%

“OEM plugs”

Advertised Vs Actual Product29%

“Exactly what we ordered”

Size-Overall25%

“Fits and functioned great”

Quality-Overall8%

“well made”

Efficiency4%

“Work fine”

Top return reasons

Size-Overall56%
Compatibility-Overall21%
Advertised Vs Actual Product8%
Defective Material/Parts3%
Product Condition3%
Heating1%
Width1%
Socket/Port/Plug1%
Connectivity-Overall1%
Flammable1%