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20x21x1 air filter
Skip itBrand-locked demand (top 5 brands take 97% of clicks) — this niche doesn't clear our bar today.
Returns
Incredible1.0%return rate — above 5% kills the launch gate
Avg price
Incredible$43.55avg listing price — sweet spot $15–$100
Price range
Great$18.15–$108.16cheapest to priciest tracked listing — scored on the share inside $15–$100
Growth
Good+48.1%90-day search growth — must beat 0% to launch
Conversion
Good5.7%search→purchase rate — share of searches ending in a sale
Market size
Bad$97K$97K/yr · 39K searches
Quality gap
Bad4.7★avg incumbent rating — lower means beatable quality
Review moat
Bad20,363.15avg incumbent reviews — the moat a new listing must climb
Competition
Bad82%top-5 click share — a locked-up shelf
Brand share
Bad97%top-5 brand share — brand-locked demand