Smoke detector · Kidde · price guide
Kidde 20SDR value
A Kidde 20SDR smoke detector sells for about $17.99 on eBay, from 38 sales between Mar 19, 2026 and Oct 7, 2026. Most sell for $15.99 to $19.65. Used ones bring $15.99, new ones $18.95. At local online auctions it has gone for $5.
1 sale above $30 drawn at the top edge. 1 older sale before Jun 25 not drawn (in the numbers below).
See the numbers
| Month | Sales | Middle price |
|---|---|---|
| Mar 2026 | 1 | $18 |
| Jul 2026 | 10 | $17.68 |
| Aug 2026 | 12 | $18.95 |
| Sep 2026 | 10 | $18.94 |
| Oct 2026 | 5 | $15.75 |
The flip math
What one Kidde 20SDR is worth to a reseller, line by line.
To keep at least 2 times what you pay, bid no more than $0. Above $0.70 you lose money after every fee. Run your own numbers.
Local auction prices
1 single Kidde 20SDR lot closed at Kansas and Missouri online auctions we track, at a middle winning bid of $5.
| Closed | Winning bid |
|---|---|
| Oct 13, 2026 | $5 |
Selling notes
- 89% of sales shipped free; the rest charged a middle $6.48 for shipping.
- 13% sold through Best Offer, where the real price can be lower than shown.
- The last 60 days are steady against the 4 months before.
- 3 sold in the last 30 days, 23 in the last 90.
Questions
How much is a used Kidde 20SDR smoke detector worth?
About $15.99 on eBay, the middle of 15 used sales between Mar 19, 2026 and Oct 7, 2026. Most used ones sell for $15.99 to $19.65 once new ones are counted too.
What does a new Kidde 20SDR smoke detector sell for?
New ones sold for a middle price of $18.95 across 23 eBay sales.
How fast does a Kidde 20SDR sell?
3 sold on eBay in the last 30 days and 23 in the last 90. Prices are steady against the months before. 89% of sales came with free shipping.
What does a Kidde 20SDR go for at auction?
At the Kansas and Missouri online auctions we track, 1 single Kidde 20SDR lot closed at a middle winning bid of $5, against $17.99 on eBay.
Is a Kidde 20SDR worth flipping?
Sold at $15.99 on eBay you keep about $2.90 after fees, shipping and a returns buffer. To double your money, pay no more than $0 as a winning bid with an 18% premium and 9% tax.
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Look up yoursHow we got these numbers
- 38 eBay sales of the Kidde 20SDR from Mar 19, 2026 to Oct 7, 2026, each one checked to be this model (at least half name it in the listing; the rest match it closely).
- eBay prices are completed sales (what buyers paid), not asking prices, from our sold-data provider. We keep only sales of the same product: parts, accessories, bundles and look-alikes are dropped before anything is counted.
- Local auction prices are winning bids on single-item lots at the Kansas and Missouri online auctions we track (HiBid and Equip-Bid sellers), read by our own lot reader. Lots of several units are left out.
- The money math uses our standard costs: 18% buyer's premium, 9% sales tax, a $2.00 lot fee, eBay's 13.6% + $0.40 fee, shipping at cost (never counted as profit) and a 15% buffer for returns and duds. Members set their own.