A Kidde 30CUD10 smoke co detector sells for about $29.99 on eBay, from 154 sales between Apr 10, 2026 and Oct 17, 2026. Most sell for $25 to $33.99. Used ones bring $28.99, new ones $29.99. At local online auctions it has gone for $11.
$29.99eBay sold, middle price
$25 to $33.99typical range (middle half)
$28.99used, 66 sales
$29.99new, 88 sales
$11local auctions, 1 closed
152sold in the last 90 days
What it goes for, whereLocal auction, eBay new and used, and what you keep after every fee.
Every eBay sale over time154 sales, Apr 10, 2026 to Oct 17, 2026. Tap a dot for its price.
6 sales above $80 drawn at the top edge. 3 older sales before Aug 21 not drawn (in the numbers below).
See the numbers
Month
Sales
Middle price
Apr 2026
1
$29.99
Aug 2026
23
$29.99
Sep 2026
66
$29.92
Oct 2026
64
$29.99
Where the prices fallThe shaded band is the middle half of sales: $25 to $33.99.
The flip math
What one Kidde 30CUD10 is worth to a reseller, line by line.
Sell one on eBay
Sale price (low end of typical sales)$25
eBay fees (13.6% + $0.40)−$3.80
Shipping it to the buyer−$10
Returns and duds buffer (15%)−$1.68
You keep$9.52
Buy one at a local auction for the typical $11
Winning bid$11
Buyer's premium (18%)+$1.98
Sales tax (9%)+$1.17
Lot fee+$2
You pay$16.15
Cash in hand (keep − pay)−$6.63
To keep at least 2 times what you pay, bid no more than $2.15. Above $5.85 you lose money after every fee. Run your own numbers.
Local auction prices
1 single Kidde 30CUD10 lot closed at Kansas and Missouri online auctions we track, at a middle winning bid of $11.
Closed
Winning bid
Oct 21, 2026
$11
New in stores
Amazon: $92.73 new (read Oct 25, 2026).
Lowest Amazon price on record: $35.29 (CamelCamelCamel price history, read Oct 25, 2026).
A used one sells for about 31% of the new price on eBay.
Selling notes
72% of sales shipped free; the rest charged a middle $8.13 for shipping.
19% sold through Best Offer, where the real price can be lower than shown.
The last 60 days are steady against the 4 months before.
43 sold in the last 30 days, 152 in the last 90.
Questions
How much is a used Kidde 30CUD10 smoke co detector worth?
About $28.99 on eBay, the middle of 66 used sales between Apr 10, 2026 and Oct 17, 2026. Most used ones sell for $25 to $33.99 once new ones are counted too.
What does a new Kidde 30CUD10 smoke co detector sell for?
New ones sold for a middle price of $29.99 across 88 eBay sales. Amazon listed it new at $92.73 on Oct 25, 2026.
How fast does a Kidde 30CUD10 sell?
43 sold on eBay in the last 30 days and 152 in the last 90. Prices are steady against the months before. 72% of sales came with free shipping.
What does a Kidde 30CUD10 go for at auction?
At the Kansas and Missouri online auctions we track, 1 single Kidde 30CUD10 lot closed at a middle winning bid of $11, against $29.99 on eBay.
Is a Kidde 30CUD10 worth flipping?
Sold at $25 on eBay you keep about $9.52 after fees, shipping and a returns buffer. To double your money, pay no more than $2.15 as a winning bid with an 18% premium and 9% tax.
154 eBay sales of the Kidde 30CUD10 from Apr 10, 2026 to Oct 17, 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.