Set 77120
Shadow's Mech vs. G.U.N. Trooper
On shelves nowRetail price$49.99What LEGO charged
Worth now$49.66Typical sealed asking price · 6 listings
Recently sold—No recent sales on file
vs retail−1%Worth less than shop price
Not at retail
At $50 retail there's no margin left — pay under $22.
How much is LEGO 77120 Shadow's Mech vs. G.U.N. Trooper worth?
LEGO 77120 Shadow's Mech vs. G.U.N. Trooper is worth about $49.66 sealed right now, based on 6 live sealed listings on eBay. That's 1% below its $49.99 retail price. It came out in 2026 with 374 pieces and 1 minifigure. It's still sold in shops. Over the last 72 days its typical asking price has fallen 29%, from $69.99 to $49.66. We last checked it today.
Price history
Value history
Oct 26$506 listings
- Lowest
- $49
- Highest
- $70
- Change
- -29%
- Asking vs retail
- -1%
19 observations · median asking · rechecked 8× daily
Should you buy it?
If you bought it to resell
Sells sealed for$50
Marketplace fees · 15.25%−$8
Payment processing · 2.9% + $0.30−$2
Shipping · est. from 374 pieces−$13
Reaches you$27
Pay no more than$21
For a 30% return at your costs. Change them and every figure on the site follows.
How long has it been on shelves?
Still early — released 2026, and sets like this usually run about 3 years. No hurry.
LEGO never announces retirement dates. This is only how long the set has been available against how long sets of its size usually run — not a prediction, and not inside information.
Set details
- Set number
- 77120
- Theme
- Sonic The Hedgehog
- Released
- 2026
- Status
- On shelves now
- Pieces
- 374
- Minifigures
- 1
- Retail price
- $49.99
- Value per piece
- $0.133
- Price confidence
- medium · 6 listings
- Last checked
- today
Where these numbers come from
eBay6 live listingsThe asking price here — the median of what sellers want right now, $50. Last checked Oct 26.See the listings →BrickLinkPrice guideNo completed sales recorded for this one yet. Last checked Oct 22.Open the price guide →Catalogue374 piecesPiece counts, minifigures, release year and retail price come from Rebrickable and Brickset. Retail was $50.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 Sonic The Hedgehog sets from around 2026
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▲ 27% vs retail77119 · 2026Tails' Tornado-1Sonic The Hedgehog · 310 pcs$3819 listings · retail $30Not at retail
▼ 13% vs retailRetired77118 · 2026Silver's Car vs. Knuckles' Monster TruckSonic The Hedgehog · 378 pcs$3538 listings · retail $40No retail price on file
▲ 44% vs retailRetired77117 · 2026Sonic: Speedster LightningSonic The Hedgehog · 126 pcs$1436 listings · retail $10Too expensive
30733 · 2026Badnik: SkorpSonic The Hedgehog · 80 pcs$929 listingsToo expensive