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36

sdr

Skip it

Soft demand (-17.4% this quarter) — this niche doesn't clear our bar today.

Market size 25Growth 16Conversion 17Competition 28Returns 39Price range 28Avg price 81Brand share 23Review moat 74Quality gap 83

Quality gap

Great4.2★

avg incumbent rating — lower means beatable quality

Avg price

Great£82.36

avg listing price — sweet spot $15–$100

Review moat

Good545.81

avg incumbent reviews — the moat a new listing must climb

Returns

Okay3.9%

return rate — above 5% kills the launch gate

Competition

Okay68%

top-5 click share — leaders hold, buyers still browse

Price range

Okay£14.88–£323.83

cheapest to priciest tracked listing — scored on the share inside $15–$100

Market size

Okay£101K

£101K/yr · 89K searches

Brand share

Bad91%

top-5 brand share — brand-locked demand

Conversion

Bad1.4%

search→purchase rate — share of searches ending in a sale

Growth

Bad-17.4%

90-day search growth — must beat 0% to launch

According to Flapen's Amazon United Kingdom niche tracking, sdr is a £101K/yr Amazon United Kingdom market (89K searches/yr). The top 5 brands hold 91% of demand. Verdict: Skip it — 36/100.

Data updated Jul 21, 2026 · scored weekly · How we score niches

sdr market data

Units sold / yr
1K–2K
avg 0–100/product
Revenue / yr
£103K–£124K
units × avg price
Conversion rate
1.4%
Avg BSR
#148
Page quality
0%
Prime
90%
Sponsored
62%
Out of stock
5.6%
Avg brand age
39 months
Avg seller age
224 days

Competition & brand share

The top 5 products take 68% of clicks — established leaders, but buyers still shop beyond them.

Brands

11 falling

Sellers

30

Top-5 brand share

91%

Top 20: 100%

Top-5 click share

68%

Top 20: 99%

Open market

7%

  • NooElec39%
  • RTL-SDR Blog38%
  • TARSHYRY8%
  • AURSINC3%
  • Dropfree3%
  • HanOaki2%
  • Open — no brand owns it (5 brands, 7%)

Demand & seasonality

Weekly Amazon search volume, last 104 weeks — -17.4% search growth over the last 90 days.
3K2KSpike '24Holiday '24Prime Day '25Spike '25Black Friday '25Spike '26SepDecMarJunAugNovMarMay

No pronounced peak months · busiest ÷ quietest = 1.5×

Top sdr search terms

  • sdr radio receiver26K/yr
  • sdr21K/yr
  • rtl sdr14K/yr
  • sdr radio8K/yr
  • sdr dongle6K/yr
  • rtl sdr v45K/yr
  • rtl-sdr4K/yr
  • software defined radio3K/yr
  • rtl2832u3K/yr
All search terms

Top sdr products on Amazon

Each bubble is one product — market share against review moat; bubble size tracks estimated sales, color grades how beatable the incumbent looks.

0%5%£5K10%£10K15%£15K20%£20K1101001K10K Reviews — right = deep review moat Market share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)2 products missing review or click data not plotted

All 21 tracked products in this niche — three views at once, no toggling.

What buyers say about sdr

What buyers praise and complain about, mined from review topics.

What buyers love

Value For Money26%

“Worth the money”

Assembly/Installation12%

“Good if you know how to install”

Quality-Overall10%

“Build quality is really good”

Signal Strength10%

“Got quite good coverage with supplied antenna”

Compatibility-Overall6%

“Compatible with most SDR software”

Functionality-Overall5%

“they work”

Advertised Vs Actual Product5%

“As described worked great”

Ease Of Use4%

“easy to use”

Portability3%

“Probably my favorite gadget of all time”

Heating2%

“It does warm mind you so careful where you leave it”

What buyers complain about

Signal Strength14%

“Needs a better antenna for best results”

Quality-Overall12%

“terrible everywhere else”

Software/Application8%

“Could not download software contacted the makers”

Compatibility-Overall8%

“Old and incompatible”

Ease Of Use8%

“Been struggling to get it to work”

Audio Quality4%

“are complicated to get it to sound right”

Functionality-Overall4%

“Didn't work for me”

Durability3%

“My previous earlier model SMArt lasted more than 7 years - the V5 lasted only a year”

Instructions/User Manual/Troubleshooting3%

“Great radio, dodgy instruction leaflet”

Connectivity-Overall3%

“became intermittent and plugging in/out any other USB device disconnected the NESDR”

Top return reasons

Functionality-Overall21%
Compatibility-Overall16%
Signal Strength9%
Defective Material/Parts9%
Software/Application7%
Connectivity-Overall5%
Heating4%
Range4%
Durability2%
Value For Money2%

Common questions

Is sdr profitable to sell on Amazon United Kingdom?
The niche generates £101K/yr across 21 tracked products. 0 of 4 products launched in the last 360 days are still selling. 90-day search growth is -17.4%. Flapen's verdict: Skip it (36/100).
How competitive is the sdr niche?
11 brands and 30 sellers compete. The top 5 products take 68% of clicks and top 5 brands hold 91% of demand.
What do buyers complain about in sdr?
Top complaints mined from reviews: Signal Strength, Quality-Overall, Software/Application. The return rate is 3.9%.
When does demand for sdr peak?
Demand is steady year-round — the busiest month runs 1.5× the quietest.
What does it cost to enter the sdr niche?
Listings span £14.88–£323.83; the average listing price is £82.36 (sweet spot $15–$100). The average incumbent carries 546 reviews — the moat a new listing must climb.