Set 71870
The Twin Titan Mechs
On shelves nowRetail price$139.99What LEGO charged
Worth now$209.99Typical sealed asking price · 19 listings
Recently sold—No recent sales on file
vs retail+50%Worth more than it cost
Worth watching
Retail is $140; you'd want it nearer $122. Wait for a sale.
How much is LEGO 71870 The Twin Titan Mechs worth?
LEGO 71870 The Twin Titan Mechs is worth about $209.99 sealed right now, based on 19 live sealed listings on eBay. That's 50% above its $139.99 retail price. It came out in 2026 with 1,708 pieces and 3 minifigures. It's still sold in shops. Over the last 86 days its typical asking price has risen 13%, from $186.51 to $209.99. We last checked it 4 days ago.
Price history
Value history
Oct 21$21019 listings
- Lowest
- $183
- Highest
- $218
- Change
- +13%
- Asking vs retail
- +50%
27 observations · median asking · rechecked 8× daily
Should you buy it?
Still on shelves at $140 and already worth $210 sealed. That’s the one to watch.
If you bought it to resell
Sells sealed for$210
Marketplace fees · 15.25%−$32
Payment processing · 2.9% + $0.30−$7
Shipping · est. from 1,708 pieces−$26
Reaches you$145
Pay no more than$111
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
- 71870
- Theme
- Ninjago
- Released
- 2026
- Status
- On shelves now
- Pieces
- 1,708
- Minifigures
- 3
- Retail price
- $139.99
- Value per piece
- $0.123
- Price confidence
- high · 19 listings
- Last checked
- 4 days ago
Where these numbers come from
eBay19 live listingsThe asking price here — the median of what sellers want right now, $210. Last checked Oct 21.See the listings →BrickLinkPrice guideNo completed sales recorded for this one yet. Last checked Oct 22.Open the price guide →Catalogue1,708 piecesPiece counts, minifigures, release year and retail price come from Rebrickable and Brickset. Retail was $140.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 Ninjago sets from around 2026
See all →
▲ 22% vs retail71869 · 2026Land BountyNinjago · 1,215 pcs$15919 listings · retail $130Not at retail
▲ 11% vs retail71871 · 2026Battle at the Dragon's BladeNinjago · 1,017 pcs$11124 listings · retail $100Not at retail
▲ 48% vs retailRetired71872 · 2026Ultra Dragon BattleNinjago · 2,178 pcs$29517 listings · retail $200Holding value
▲ 24% vs retail71868 · 2026Wyldfyre's Transforming Dragon MechNinjago · 821 pcs$11217 listings · retail $90Not at retail