LEGO Hidden Side sets that gained the most value
All 11 LEGO Hidden Side sets whose estimated value new is the highest compared with their original US retail price, out of 11 sets now estimated above it.
| # | Set | Name | Year | Pieces | Retail (USD) | Retail today CPI-U | Value new estimate | vs retail |
|---|---|---|---|---|---|---|---|---|
| 1 | 70437-1 | Mystery Castle | 2020 | 1,035 | $99.99 | $121 | $190–250 | 1.6 to 2.1× |
| 2 | 70433-1 | J.B.'s Submarine | 2020 | 224 | $19.99 | $24 | $30–45 | 1.2 to 1.9× |
| 3 | 70427-1 | Welcome to the Hidden Side | 2020 | 189 | $19.99 | $24 | $30–45 | 1.2 to 1.9× |
| 4 | 70435-1 | Newbury Abandoned Prison | 2020 | 400 | $39.99 | $48 | $60–75 | 1.2 to 1.5× |
| 5 | 70436-1 | Phantom Fire Truck 3000 | 2020 | 760 | $59.99 | $73 | $85–110 | 1.2 to 1.5× |
| 6 | 70431-1 | The Lighthouse of Darkness | 2020 | 548 | $49.99 | $61 | $60–80 | 1.0 to 1.3× |
| 7 | 70434-1 | Supernatural Race Car | 2020 | 244 | $29.99 | $36 | $35–45 | 1.0 to 1.2× |
| 8 | 70429-1 | El Fuego's Stunt Plane | 2020 | 303 | $29.99 | $36 | $35–45 | 1.0 to 1.2× |
| 9 | 70419-1 | Wrecked Shrimp Boat | 2019 | 311 | $29.99 | $37 | $35–45 | 1.0 to 1.2× |
| 10 | 70420-1 | Graveyard Mystery | 2019 | 336 | $29.99 | $37 | $35–45 | 1.0 to 1.2× |
| 11 | 70432-1 | Haunted Fairground | 2020 | 474 | $49.99 | $61 | $55–70 | 0.9 to 1.2× |
How this list is made
Retail prices are adjusted for US inflation (CPI-U) to today's dollars where the inflation table covers the release year; newer sets are compared with their price as it was. Estimated market values are ranges from marketplace data, for orientation only, and the "vs retail" figure is computed from the ends of the range. Only sets with a US retail price of at least $10 and 50 or more pieces are listed.