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memory stick pro duo
Skip itA concentrated shelf (top 5 take 83% of clicks) — this niche doesn't clear our bar today.
Conversion
Great8.8%search→purchase rate — share of searches ending in a sale
Returns
Great2.0%return rate — above 5% kills the launch gate
Avg price
Good£14.11avg listing price — sweet spot $15–$100
Quality gap
Good4.4★avg incumbent rating — lower means beatable quality
Price range
Good£3.67–£28.52cheapest to priciest tracked listing — scored on the share inside $15–$100
Growth
Okay+4.9%90-day search growth — must beat 0% to launch
Review moat
Bad4,140avg incumbent reviews — the moat a new listing must climb
Brand share
Bad91%top-5 brand share — brand-locked demand
Market size
Bad£81K£81K/yr · 65K searches
Competition
Bad83%top-5 click share — a locked-up shelf
Signals Low Review Barrier