
Set 77983
At $100 retail there's no margin left — pay under $74.
LEGO 77983 Mosasaurus Dinosaur Boat Attack is worth about $132.34 sealed right now, based on 22 live sealed listings on eBay. That's 32% above its $99.99 retail price. It came out in 2026 with 703 pieces and 3 minifigures. It's still sold in shops. Its typical asking price has held steady over the last 83 days. We last checked it 4 days ago.
22 listings. Solid number.
If you bought it to resell
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.
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.
▲ 35% vs retail77984 · 2026Jurassic Park Jeep WranglerJurassic World · 1,926 pcs$27012 listings · retail $200Worth watching
▲ 36% vs retail77982 · 2026Spinosaurus Dinosaur EscapeJurassic World · 822 pcs$10223 listings · retail $75Not at retail
▲ 16% vs retail77985 · 2026Dinosaur Fossils: TriceratopsJurassic World · 1,154 pcs$12835 listings · retail $110Not at retail
▲ 48% vs retail77981 · 2026Velociraptor, Stegosaurus & Pteranodon RescueJurassic World · 171 pcs$743 listings · retail $50Not enough data