51
water hardness test kit
Worth a lookShows searches that convert (15.9% search→purchase), but a concentrated shelf (top 5 take 81% of clicks) keeps it on the watch list.
Conversion
Incredible15.9%search→purchase rate — share of searches ending in a sale
Returns
Great1.4%return rate — above 5% kills the launch gate
Market size
Great$1.0M$1.0M/yr · 425K searches
Avg price
Great$15.42avg listing price — sweet spot $15–$100
Price range
Good$5.92–$38.37cheapest to priciest tracked listing — scored on the share inside $15–$100
Quality gap
Good4.4★avg incumbent rating — lower means beatable quality
Brand share
Bad91%top-5 brand share — brand-locked demand
Review moat
Bad6,994.27avg incumbent reviews — the moat a new listing must climb
Growth
Bad-18.6%90-day search growth — must beat 0% to launch
Competition
Bad81%top-5 click share — a locked-up shelf