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12x18x1 air filter
Skip itA concentrated shelf (top 5 take 79% of clicks) — this niche doesn't clear our bar today.
Returns
Incredible0.7%return rate — above 5% kills the launch gate
Avg price
Incredible$37.21avg listing price — sweet spot $15–$100
Price range
Great$5.40–$59.53cheapest to priciest tracked listing — scored on the share inside $15–$100
Conversion
Great7.8%search→purchase rate — share of searches ending in a sale
Growth
Good+42.5%90-day search growth — must beat 0% to launch
Market size
Okay$101K$101K/yr · 35K searches
Brand share
Bad91%top-5 brand share — brand-locked demand
Quality gap
Bad4.7★avg incumbent rating — lower means beatable quality
Review moat
Bad12,662.88avg incumbent reviews — the moat a new listing must climb
Competition
Bad79%top-5 click share — a locked-up shelf