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california king box spring
Skip itHigh returns (6.9%) — this niche doesn't clear our bar today.
Avg price
Good$115.24avg listing price — sweet spot $15–$100
Quality gap
Good4.4★avg incumbent rating — lower means beatable quality
Brand share
Good66%top-5 brand share — brands hold most of the demand
Market size
Good$496K$496K/yr · 142K searches
Competition
Good50%top-5 click share — leaders hold, buyers still browse
Review moat
Okay2,410.68avg incumbent reviews — the moat a new listing must climb
Conversion
Okay3.0%search→purchase rate — share of searches ending in a sale
Price range
Okay$73.59–$142.88cheapest to priciest tracked listing — scored on the share inside $15–$100
Growth
Bad-0.5%90-day search growth — must beat 0% to launch
Returns
Bad6.9%return rate — above 5% kills the launch gate