Is crystal radio kit profitable to sell on Amazon United States?

The niche generates $48K/yr across 40 tracked products. 1 of 8 products launched in the last 360 days are still selling. 90-day search growth is -18.4%. Flapen's verdict: Worth a look (56/100).

How competitive is the crystal radio kit niche?

24 brands and 33 sellers compete. The top 5 products take 40% of clicks and top 5 brands hold 52% of demand.

What do buyers complain about in crystal radio kit?

Top complaints mined from reviews: Instructions/User Manual/Troubleshooting, Functionality-Overall, Assembly/Installation. The return rate is 1.6%.

When does demand for crystal radio kit peak?

Demand peaks in Nov–Dec; the busiest month runs 3.1× the quietest.

What does it cost to enter the crystal radio kit niche?

Listings span $6.35–$140.93; the average listing price is $26.23 (sweet spot $15–$100). The average incumbent carries 239 reviews — the moat a new listing must climb.

crystal radio kit

Worth a look

Shows a sweet-spot price point ($26.23 avg), but a failed launch gate (market size, growth, or returns) keeps it on the watch list.

Avg price

Incredible$26.23

avg listing price — sweet spot $15–$100

Quality gap

Great4.1★

avg incumbent rating — lower means beatable quality

Review moat

Great239.23

avg incumbent reviews — the moat a new listing must climb

Brand share

Great52%

top-5 brand share — no brand owns this niche

Returns

Great1.6%

return rate — above 5% kills the launch gate

Competition

Good40%

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

Price range

Good$6.35–$140.93

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

Conversion

Okay2.5%

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

Growth

Bad-18.4%

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

Market size

Bad$48K

$48K/yr · 72K searches

Signals No Dominant Brand

According to Flapen's Amazon United States niche tracking, crystal radio kit is a $48K/yr Amazon United States market (72K searches/yr). The top 5 brands hold 52% of demand. Demand peaks in Nov–Dec. Verdict: Worth a look — 56/100.

Data updated Jul 30, 2026 · scored weekly · How we score niches

crystal radio kit market data

Units sold / yr: 2K–3K; avg 0–100/product
Revenue / yr: $52K–$66K; units × avg price
Conversion rate: 2.5%
Avg BSR: #997
Page quality: 0%
Prime: 98%
Sponsored: 90%
Out of stock: 2.7%
Avg brand age: 43 months
Avg seller age: 184 days

Competition & brand share

The top 5 products take 40% of clicks — established leaders, but buyers still shop beyond them.

Brands

24 falling

Sellers

Top-5 brand share

52%

Top 20: 97%

Top-5 click share

40%

Top 20: 83%

Open market

41%

IS13%
CYOEST11%
choopheme9%
Elenco9%
diymore9%
Nautydaddy7%

Demand & seasonality

Weekly Amazon search volume, last 104 weeks — -18.4% search growth over the last 90 days.

Peak months: Nov, Dec · busiest ÷ quietest = 3.1×

Open Trend

Top crystal radio kit search terms

radio kits to build16K/yr -10.9%1.5% conv.
diy radio kit11K/yr -10.1%2.4% conv.
fm radio kit12K/yr -37.1%2.3% conv.
diy radio6K/yr -11.4%1.4% conv.
build a radio kit5K/yr -9.4%3.5% conv.
radio building kit4K/yr -0.2%3.4% conv.
build your own radio kit5K/yr +2.9%3.3% conv.
radio kits3K/yr -3.9%1.2% conv.
build your own radio5K/yr -50.1%4.7% conv.
build a radio4K/yr -50.0%2.2% conv.

All search terms

Top crystal radio kit 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★)

All 24 tracked products in this niche — three views at once, no toggling.

Top sellers

by 90-day click share

Science Kits for Kids Age 8-12 12-14 STEM Kits for Kids Age 8-10 STEM Toys Build Your Own FM Radio Kit DIY Electronic Snap Circuits Projects Gifts for Teen Girls Boys 9 11 13 15 16+ (Classic Wood)

CYOEST$9.374.5★1,314 rev

Stem Projects Toys for Boys age 8-12 12-14 Science Kit Building Own Bluetooth Speaker & FM Radio DIY Electronics Kit Science Experiments Kid 9-12 Boy Toys Birthday Gift 8 9 10 11 13 Year Old Teen Girl

choopheme$19.074.4★430 rev

NautyDaddy FM Radio Kit STEM Toys for Ages 8-13 DIY Wooden 3D Puzzle to Build a Working FM Radio Educational Science Kit for Kids 8-12+ 88-108 MHz

Nautydaddy$22.484.3★93 rev

Diymore DIY FM Radio Kit Soldering Practice Electronics Project Transparent Case with PCB Speaker Digital Display for Beginners & STEM Learning

diymore$15.554.0★6 rev

FM Radio Kit ICSTATION Soldering Projects Radio with LED Flashing Lights DIY Radio Kit LCD1602 Display FM 87-108MHz Soldering Practice Kit for Back to School Solder Education Creative Present

IS$28.614.2★362 rev

Newest

by launch date

Diymore DIY FM Radio Kit Soldering Practice Electronics Project Transparent Case with PCB Speaker Digital Display for Beginners & STEM Learning

diymore$15.556 rev

3mo ago

diymore DIY Bluetooth Speaker Kit USB Mini Stereo Amplifier Soldering Kit Radio Soldering Practice Kit Remote Control for TF/AUX/Bluetooth/USB Support for Home and School Education Gifts

diymore$17.704 rev

3mo ago

LUMINZENLUX DIY FM Radio Soldering Practice Kit 87-108MHz with 2 Power Modes (USB/Battery) & Acrylic Case STEM Project for Beginners & School Education Complete Kit with PCB Components Speaker

LUMINZENLUX$28.8210 rev

4mo ago

PANTASY Retro Radio Building Set with Light and Moving Tuning Knob

PANTASY$61.7840 rev

5mo ago

GeekLJT Upgraded RDA5807 Radio Soldering Kit DIY Solder Project Portable Radio DIY Electronic Kits Practice Soldering Kit for Learning and Teaching Solder and Electronic

GeekLJT$18.4936 rev

1y ago

What buyers say about crystal radio kit

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

What buyers love

Assembly/Installation15%

“Easy enough to assemble”

Fun/Entertainment Experience15%

“Fun to put together”

Quality-Overall8%

“This is a good-quality kit”

Gifting Purpose7%

“Very cool gift”

Instructions/User Manual/Troubleshooting6%

“The instructions were clear”

Design-Overall6%

“has a unique look”

Educational-Overall5%

“It is educational”

Audio Quality5%

“Sound is great”

Value For Money4%

“Worth it”

Ease Of Use4%

“Easy and quick”

What buyers complain about

Instructions/User Manual/Troubleshooting14%

“The instructions aren't great”

Functionality-Overall10%

“Radio doesnt work”

Assembly/Installation8%

“hard to assemble”

Quality-Overall7%

“Cheap quality”

Size-Overall5%

“Ic chip is way too small”

Durability3%

“easy to break”

Noise Level2%

“it only makes a buzzing sound”

Value For Money2%

“Not worth the price”

Strength2%

“Not super sturdy”

Audio Quality2%

“I still cannot get any sound out of any speaker I connect to it”

Top return reasons

Functionality-Overall17%

Defective Material/Parts17%

Size-Overall16%

Advertised Vs Actual Product7%

Gifting Purpose5%

Assembly/Installation5%

Instructions/User Manual/Troubleshooting5%