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express water replacement filters
Skip itBrand-locked demand (top 5 brands take 100% of clicks) — this niche doesn't clear our bar today.
Market size
Incredible$3.7M$3.7M/yr · 311K searches
Conversion
Good6.3%search→purchase rate — share of searches ending in a sale
Avg price
Okay$186.93avg listing price — sweet spot $15–$100
Review moat
Okay2,521.32avg incumbent reviews — the moat a new listing must climb
Returns
Okay3.8%return rate — above 5% kills the launch gate
Competition
Okay62%top-5 click share — leaders hold, buyers still browse
Quality gap
Okay4.5★avg incumbent rating — lower means beatable quality
Growth
Okay+6.4%90-day search growth — must beat 0% to launch
Price range
Bad$22.48–$568.55cheapest to priciest tracked listing — scored on the share inside $15–$100
Brand share
Bad100%top-5 brand share — brand-locked demand
Signals High Price