Set 8399
K-9 Bot
Retired Dec 2009Retail price$3.49What LEGO charged
Worth now$34.99Typical sealed asking price · 4 listings
Recently sold$18.00Only 1 sale so far — too few to lean on
vs retail+903%Worth more than it cost
Not enough data
Fewer than 5 listings behind this value — too thin to call.
How much is LEGO 8399 K-9 Bot worth?
LEGO 8399 K-9 Bot is worth about $34.99 sealed right now, based on 4 live sealed listings on eBay. That's 903% above its $3.49 retail price. It came out in 2009 with 22 pieces and 1 minifigure. It was retired in Dec 2009. We last checked it 4 days ago.
Price history
Value history
Oct 24$354 listings
- Lowest
- $35
- Highest
- $35
- Change
- 0%
- Asking vs retail
- +903%
2 observations · median asking · rechecked 8× daily · early days — a line drawn through 2 readings shows what we measured, not a trend
Should you buy it?
Only 4 listings behind this. I wouldn’t bet money on the number yet.
If you bought it to resell
Sells sealed for$35
Marketplace fees · 15.25%−$5
Payment processing · 2.9% + $0.30−$1
Shipping · est. from 22 pieces−$5
Reaches you$23
Pay no more than$18
For a 30% return at your costs. Change them and every figure on the site follows.
What it actually sold for
Sealed
$18
1 sold in six monthsUsed
$9
3 sold in six monthsSellers are asking 94% more than buyers actually paid. The $35 figure above is a ceiling; this is the floor to negotiate toward.
Completed BrickLink transactions over the last six months. Real sales, not asking prices.
Set details
- Set number
- 8399
- Theme
- Space · Space Police III
- Released
- 2009
- Status
- Retired Dec 2009
- Pieces
- 22
- Minifigures
- 1
- Retail price
- $3.49
- Value per piece
- $1.59
- Price confidence
- low · 4 listings
- Last checked
- 4 days ago
Where these numbers come from
eBay4 live listingsThe asking price here — the median of what sellers want right now, $35. Last checked Oct 24.See the listings →BrickLink1 completed salesWhat it actually sold for — $18 across six months of real transactions. Last checked Oct 27.Open the price guide →Catalogue22 piecesPiece counts, minifigures, release year and retail price come from Rebrickable and Brickset. Retail was $3.See the catalogue entry →
eBay links are affiliate links — if you buy after clicking, we earn a small commission at no cost to you, and that is what pays for the site. BrickLink has no such programme, so those are plain links. Neither changes what we show or what we say about it.
How to read this. The value is the median of live sealed listings, after removing instructions, empty boxes, used sets, multi-set lots and implausible outliers. Real sale prices usually land below asking, so the buy-below figure is deliberately the conservative end of the range.
More Space sets from around 2009
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