Set 71390
Reznor Knockdown Expansion Set
Retired Sep 2023Retail price$69.99What LEGO charged
Worth now$35.84Based on 20 recent sealed sales
Asking now$43.23Typical price on 28 eBay listings
vs retail−49%Worth less than shop price
Below retail
Trading 49% under its $70 retail price even after retiring — the market has had its say.
How much is LEGO 71390 Reznor Knockdown Expansion Set worth?
LEGO 71390 Reznor Knockdown Expansion Set is worth about $35.84 sealed right now, based on 20 recent sealed sales. That's 49% below its $69.99 retail price. It came out in 2021 with 862 pieces and 4 minifigures. It was retired in Sep 2023. Over the last 83 days its typical asking price has risen 8%, from $40.00 to $43.23. We last checked it 6 days ago.
Price history
Value history
Oct 19$4328 listings
- Lowest
- $40
- Highest
- $50
- Change
- +8%
- Asking vs retail
- -38%
26 observations · median asking · rechecked 8× daily
Should you buy it?
Sellers want $43, but it’s actually been going for $36. Offer low.
If you bought it to resell
Sells sealed for$36
Marketplace fees · 15.25%−$5
Payment processing · 2.9% + $0.30−$2
Shipping · est. from 862 pieces−$18
Reaches you$11
Pay no more than$8
For a 30% return at your costs. Change them and every figure on the site follows.
What it actually sold for
Sealed
$36
20 sold in six months · $28–$40Used
$26
2 sold in six monthsSellers are asking 21% more than buyers actually paid. The $43 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
- 71390
- Theme
- Super Mario
- Released
- 2021
- Status
- Retired Sep 2023
- Pieces
- 862
- Minifigures
- 4
- Retail price
- $69.99
- Value per piece
- $0.05
- Price confidence
- high · 28 listings
- Last checked
- 6 days ago
Where these numbers come from
eBay28 live listingsThe asking price here — the median of what sellers want right now, $43. Last checked Oct 19.See the listings →BrickLink20 completed salesWhat it actually sold for — $36 across six months of real transactions. Last checked Oct 22.Open the price guide →Catalogue862 piecesPiece counts, minifigures, release year and retail price come from Rebrickable and Brickset. Retail was $70.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.
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