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whirlpool refrigerator water filter 4
Skip itBrand-locked demand (top 5 brands take 100% of clicks) — this niche doesn't clear our bar today.
Conversion
Incredible20.7%search→purchase rate — share of searches ending in a sale
Avg price
Incredible$32.96avg listing price — sweet spot $15–$100
Price range
Incredible$22.37–$50.05cheapest to priciest tracked listing — scored on the share inside $15–$100
Returns
Great1.2%return rate — above 5% kills the launch gate
Market size
Great$1.2M$1.2M/yr · 174K searches
Growth
Okay+6.8%90-day search growth — must beat 0% to launch
Review moat
Bad13,043.83avg incumbent reviews — the moat a new listing must climb
Quality gap
Bad4.7★avg incumbent rating — lower means beatable quality
Competition
Bad96%top-5 click share — a locked-up shelf
Brand share
Bad100%top-5 brand share — brand-locked demand