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magnesium test kit saltwater
Skip itBrand-locked demand (top 5 brands take 100% of clicks) — this niche doesn't clear our bar today.
Returns
Incredible0.6%return rate — above 6% kills the launch gate
Avg price
Incredible$30.95avg listing price — sweet spot $15–$100
Price range
Great$12.60–$89.37cheapest to priciest tracked listing — scored on the share inside $15–$100
Conversion
Great7.8%search→purchase rate — share of searches ending in a sale
Review moat
Good556.23avg incumbent reviews — the moat a new listing must climb
Quality gap
Okay4.5★avg incumbent rating — lower means beatable quality
Competition
Bad74%top-5 click share — a locked-up shelf
Market size
Bad$84K$84K/yr · 35K searches
Growth
Bad-9.1%90-day search growth — must beat 0% to launch
Brand share
Bad100%top-5 brand share — brand-locked demand