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under sink water filter
Skip itBrand-locked demand (top 5 brands take 95% of clicks) — this niche doesn't clear our bar today.
Avg price
Great£56.64avg listing price — sweet spot $15–$100
Returns
Great1.8%return rate — above 5% kills the launch gate
Price range
Good£10.68–£130.58cheapest to priciest tracked listing — scored on the share inside $15–$100
Quality gap
Okay4.5★avg incumbent rating — lower means beatable quality
Market size
Okay£196K£196K/yr · 143K searches
Conversion
Okay2.4%search→purchase rate — share of searches ending in a sale
Review moat
Bad4,558.08avg incumbent reviews — the moat a new listing must climb
Growth
Bad-2.1%90-day search growth — must beat 0% to launch
Competition
Bad77%top-5 click share — a locked-up shelf
Brand share
Bad95%top-5 brand share — brand-locked demand
Signals High Price