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ink cartridges fountain pen
Skip itPrices mostly outside the sweet spot ($0.86–$11.73) — this niche doesn't clear our bar today.
Returns
Incredible0.4%return rate — above 5% kills the launch gate
Conversion
Great9.8%search→purchase rate — share of searches ending in a sale
Competition
Good53%top-5 click share — leaders hold, buyers still browse
Quality gap
Good4.4★avg incumbent rating — lower means beatable quality
Brand share
Okay83%top-5 brand share — brands hold most of the demand
Review moat
Bad6,156.36avg incumbent reviews — the moat a new listing must climb
Avg price
Bad£4.63avg listing price — sweet spot $15–$100
Market size
Bad£49K£49K/yr · 109K searches
Growth
Bad-28.3%90-day search growth — must beat 0% to launch
Price range
Bad£0.86–£11.73cheapest to priciest tracked listing — scored on the share inside $15–$100