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21x22x1 air filter
Skip itBrand-locked demand (top 5 brands take 100% of clicks) — this niche doesn't clear our bar today.
Returns
Incredible0.8%return rate — above 5% kills the launch gate
Price range
Incredible$39.11–$71.23cheapest to priciest tracked listing — scored on the share inside $15–$100
Avg price
Great$52.96avg listing price — sweet spot $15–$100
Growth
Great+65.5%90-day search growth — must beat 0% to launch
Conversion
Okay3.2%search→purchase rate — share of searches ending in a sale
Quality gap
Bad4.7★avg incumbent rating — lower means beatable quality
Review moat
Bad20,867.18avg incumbent reviews — the moat a new listing must climb
Competition
Bad82%top-5 click share — a locked-up shelf
Market size
Bad$40K$40K/yr · 23K searches
Brand share
Bad100%top-5 brand share — brand-locked demand
Signals High Price