Is theremin profitable to sell on Amazon United Kingdom?

The niche generates £29K/yr across 14 tracked products. 0 of 3 products launched in the last 360 days are still selling. 90-day search growth is -23.2%. Flapen's verdict: Skip it (39/100).

How competitive is the theremin niche?

12 brands and 20 sellers compete. The top 5 products take 77% of clicks and top 5 brands hold 85% of demand.

What do buyers complain about in theremin?

Top complaints mined from reviews: Ease Of Use, Noise Level, Audio Quality. The return rate is 1.1%.

What does it cost to enter the theremin niche?

Listings span £25.13–£273.80; the average listing price is £55.60 (sweet spot $15–$100). The average incumbent carries 948 reviews — the moat a new listing must climb.

theremin

Skip it

A small market ($29K/yr) — this niche doesn't clear our bar today.

Quality gap

Incredible3.8★

avg incumbent rating — lower means beatable quality

Returns

Great1.1%

return rate — above 5% kills the launch gate

Avg price

Great£55.60

avg listing price — sweet spot $15–$100

Review moat

Good948.14

avg incumbent reviews — the moat a new listing must climb

Brand share

Okay85%

top-5 brand share — brands hold most of the demand

Price range

Okay£25.13–£273.80

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

Competition

Bad77%

top-5 click share — a locked-up shelf

Conversion

Bad1.3%

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

Growth

Bad-23.2%

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

Market size

Bad£29K

£29K/yr · 42K searches

Signals Quality Gap High Price

According to Flapen's Amazon United Kingdom niche tracking, theremin is a £29K/yr Amazon United Kingdom market (42K searches/yr). The top 5 brands hold 85% of demand. Verdict: Skip it — 39/100.

Data updated Jul 28, 2026 · scored weekly · How we score niches

theremin market data

Units sold / yr: 250–500; avg 0–100/product
Revenue / yr: £14K–£28K; units × avg price
Conversion rate: 1.3%
Avg BSR: #44
Page quality: 0%
Prime: 71%
Sponsored: 79%
Out of stock: 17.7%
Avg brand age: 38 months
Avg seller age: 210 days

Competition & brand share

The top 5 products capture 77% of clicks — a locked-up shelf that new listings rarely crack.

Brands

12 flat

Sellers

Top-5 brand share

85%

Top 20: 100%

Top-5 click share

77%

Top 20: 100%

Open market

11%

Stylophone34%
MOOG18%
VIOPDER15%
Iegefirm12%
Dioche6%
Goshyda3%
Open — no brand owns it (6 brands, 11%)

Demand

Weekly Amazon search volume, last 30 weeks — -23.2% search growth over the last 90 days.

Open Trend

Top theremin search terms

theremin27K/yr -19.5%0.9% conv.
theramin5K/yr -1.9%1.9% conv.
theremin instrument7K/yr -61.7%0.9% conv.
stylophone theremin2K/yr +60.8%2.0% conv.

All search terms

Top theremin 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.

Beatable (≤4.3★) Contested Strong incumbent (>4.7★)3 products missing review or click data not plotted

All 14 tracked products in this niche — three views at once, no toggling.

Top sellers

by 90-day click share

Stylophone Theremin Award-Winning Portable Touch-Sensitive Synthesizer with Retro Analog Sound Built-In Speaker Delay & Vibrato Effects Slider Control Compact Battery-Powered Design

Stylophone£88.474.2★88 rev

MOOG Theremini - Theremin with Pitch Correction CV Out Built-In Tuner and Speaker AniMOOG Synthesizer Sound Engine with 32 Presets and LCD Screen

MOOG£273.804.5★613 rev

VIOPDER Mini Theremin Musical Electronic Instrument with Screen Display Gift Easy to Use Black

VIOPDER£32.085.0★2 rev

Iegefirm Theremin Musical Electronic Instrument with Screen Display for Boyfriend Music Fans

Iegefirm£28.370.0★0 rev

Stylophone The Original Pocket Electronic Synthesizer | Synth Musical Instrument | Synthesizer Keyboard | Stylophone Instrument Synth

Stylophone£25.134.6★11,031 rev

Newest

by launch date

Iegefirm Theremin Musical Electronic Instrument with Screen Display for Boyfriend Music Fans

Iegefirm£28.370 rev

4mo ago

YUKERMARB Mini Theremin Musical Electronic Instrument Type C Interface Multiple Adjustable Voices Theremin Vintage Musical Module

YUKERMARB£34.690 rev

6mo ago

NbgrvB Theremin Electronic Music Instrument with Colour Screen Display Pitch Indicator Multiple Voice Options Built-In Speaker Type-C Powered Portable

NbgrvB£28.970 rev

7mo ago

VIOPDER Mini Theremin Musical Electronic Instrument with Screen Display Gift Easy to Use Black

VIOPDER£32.082 rev

1y ago

Audio Theremin Vintage Music Module with Color Display Electronic Musical Instrument Adjustable 70 Tones for Musicians and Music Lovers

Yuanpgky£27.162 rev

1y ago

What buyers say about theremin

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

What buyers love

Portability17%

“Very portable”

Instructions/User Manual/Troubleshooting17%

“Great fun once you've learnt how to adjust the settings”

Advertised Vs Actual Product17%

“As expected”

Audio Quality16%

“The sound is great”

Durability13%

“it is very durable which is good becuse kids will want to touch It”

Quality-Overall8%

“it's good quality”

Ease Of Use4%

“It is also very easy to learn”

Noise Level3%

“it's quiet and tinny”

Design-Overall3%

“The idea of a miniature theremin is genuinely appealing”

What buyers complain about

Ease Of Use33%

“However I've found this very difficult - at first I thought it was going to be one of those things I couldn't do”

Noise Level17%

“First impression was that it's not as loud or smooth sounding as you think after watching a couple of vids”

Audio Quality17%

“First impression was that it's not as loud or smooth sounding as you think after watching a couple of vids”

Accuracy-Overall7%

“playing with any precision is extremely frustrating”

Top return reasons

Functionality-Overall24%

Audio Quality12%

Defective Material/Parts10%

Tune Retention10%

Durability7%

Noise Level7%

Speaker5%

Instructions/User Manual/Troubleshooting5%

Quality-Overall3%

Compatibility-Overall3%

Common questions

Is theremin profitable to sell on Amazon United Kingdom?: The niche generates £29K/yr across 14 tracked products. 0 of 3 products launched in the last 360 days are still selling. 90-day search growth is -23.2%. Flapen's verdict: Skip it (39/100).
How competitive is the theremin niche?: 12 brands and 20 sellers compete. The top 5 products take 77% of clicks and top 5 brands hold 85% of demand.
What do buyers complain about in theremin?: Top complaints mined from reviews: Ease Of Use, Noise Level, Audio Quality. The return rate is 1.1%.
What does it cost to enter the theremin niche?: Listings span £25.13–£273.80; the average listing price is £55.60 (sweet spot $15–$100). The average incumbent carries 948 reviews — the moat a new listing must climb.