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16x21x1 air filters
Worth a lookShows a sweet-spot price point ($44.79 avg), but a failed launch gate (market size, growth, or returns) keeps it on the watch list.
Avg price
Incredible$44.79avg listing price — sweet spot $15–$100
Price range
Incredible$25.59–$63.36cheapest to priciest tracked listing — scored on the share inside $15–$100
Returns
Great1.3%return rate — above 5% kills the launch gate
Conversion
Great10.3%search→purchase rate — share of searches ending in a sale
Growth
Good+41.8%90-day search growth — must beat 0% to launch
Market size
Good$361K$361K/yr · 78K searches
Competition
Okay58%top-5 click share — leaders hold, buyers still browse
Brand share
Okay88%top-5 brand share — brands hold most of the demand
Review moat
Bad6,282.52avg incumbent reviews — the moat a new listing must climb
Quality gap
Bad4.7★avg incumbent rating — lower means beatable quality