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21st birthday cards for her
Worth a lookShows low returns (0.1%), but prices mostly outside the sweet spot ($2.10–$11.62) keeps it on the watch list.
Returns
Incredible0.1%return rate — above 5% kills the launch gate
Brand share
Great43%top-5 brand share — no brand owns this niche
Conversion
Great9.6%search→purchase rate — share of searches ending in a sale
Review moat
Great372.51avg incumbent reviews — the moat a new listing must climb
Competition
Great38%top-5 click share — an open shelf
Market size
Okay£140K£140K/yr · 340K searches
Growth
Bad-4.6%90-day search growth — must beat 0% to launch
Quality gap
Bad4.7★avg incumbent rating — lower means beatable quality
Avg price
Bad£4.29avg listing price — sweet spot $15–$100
Price range
Bad£2.10–£11.62cheapest to priciest tracked listing — scored on the share inside $15–$100
Signals No Dominant Brand