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spark plug gap tool
Worth a lookShows searches that convert (13.4% search→purchase), but prices mostly outside the sweet spot ($3.89–$17.61) keeps it on the watch list.
Conversion
Incredible13.4%search→purchase rate — share of searches ending in a sale
Returns
Incredible0.9%return rate — above 5% kills the launch gate
Market size
Good$736K$736K/yr · 556K searches
Review moat
Good1,235avg incumbent reviews — the moat a new listing must climb
Brand share
Good73%top-5 brand share — brands hold most of the demand
Growth
Okay+12.2%90-day search growth — must beat 0% to launch
Competition
Okay65%top-5 click share — leaders hold, buyers still browse
Avg price
Okay$9.90avg listing price — sweet spot $15–$100
Quality gap
Okay4.6★avg incumbent rating — lower means beatable quality
Price range
Bad$3.89–$17.61cheapest to priciest tracked listing — scored on the share inside $15–$100