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sewer gas detector
Skip itBrand-locked demand (top 5 brands take 100% of clicks) — this niche doesn't clear our bar today.
Avg price
Great$62.21avg listing price — sweet spot $15–$100
Price range
Great$17.84–$124.66cheapest to priciest tracked listing — scored on the share inside $15–$100
Quality gap
Good4.3★avg incumbent rating — lower means beatable quality
Conversion
Good5.2%search→purchase rate — share of searches ending in a sale
Review moat
Okay2,477.42avg incumbent reviews — the moat a new listing must climb
Returns
Okay4.0%return rate — above 5% kills the launch gate
Market size
Okay$161K$161K/yr · 50K searches
Growth
Bad-12.2%90-day search growth — must beat 0% to launch
Competition
Bad84%top-5 click share — a locked-up shelf
Brand share
Bad100%top-5 brand share — brand-locked demand
Signals High Price