42
air filter 21.5 x 23.5 x 1
Skip itBrand-locked demand (top 5 brands take 100% of clicks) — this niche doesn't clear our bar today.
Price range
Incredible$41.54–$75.50cheapest to priciest tracked listing — scored on the share inside $15–$100
Avg price
Great$54.22avg listing price — sweet spot $15–$100
Returns
Great1.4%return rate — above 5% kills the launch gate
Growth
Great+68.2%90-day search growth — must beat 0% to launch
Conversion
Good4.9%search→purchase rate — share of searches ending in a sale
Review moat
Okay2,164.57avg incumbent reviews — the moat a new listing must climb
Quality gap
Bad4.7★avg incumbent rating — lower means beatable quality
Market size
Bad$40K$40K/yr · 15K searches
Competition
Bad95%top-5 click share — a locked-up shelf
Brand share
Bad100%top-5 brand share — brand-locked demand
Signals High Price