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Hum Toothbrush Replacement Heads
Skip itPrices mostly outside the sweet spot ($6.93–$10.10) — this niche doesn't clear our bar today.
Returns
Incredible1.0%return rate — above 5% kills the launch gate
Conversion
Great11.4%search→purchase rate — share of searches ending in a sale
Quality gap
Great4.3★avg incumbent rating — lower means beatable quality
Review moat
Good649avg incumbent reviews — the moat a new listing must climb
Competition
Bad71%top-5 click share — a locked-up shelf
Avg price
Bad$8.67avg listing price — sweet spot $15–$100
Growth
Bad-17.6%90-day search growth — must beat 0% to launch
Market size
Bad$62K$62K/yr · 63K searches
Brand share
Bad95%top-5 brand share — brand-locked demand
Price range
Bad$6.93–$10.10cheapest to priciest tracked listing — scored on the share inside $15–$100