Most Valuable Hidden Side LEGO Sets

The most valuable Hidden Side LEGO sets by current market value. This list ranks 23 sets by current BrickPicker value, refreshed from live market data. Right now the top spot belongs to Mystery Castle at $200. The top 5 alone account for about 50% of the value on this list. Every entry links to its full price history and marketplace listings. Updated 2026-07-21.

#	Name	Value	Growth	/ piece
1	Mystery Castle Hidden Side · 2020	$200	+100%	$0.19
2	Newbury Haunted High School Hidden Side · 2019	$135	+4%	$0.09
3	Phantom Fire Truck 3000 Hidden Side · 2020	$100	+67%	$0.13
4	Ghost Train Express Hidden Side · 2019	$73	-9%	$0.10
5	Haunted Fairground Hidden Side · 2020	$65	+30%	$0.14
6	Newbury Abandoned Prison Hidden Side · 2020	$60	+50%	$0.15
7	The Lighthouse of Darkness Hidden Side · 2020	$56	+11%	$0.10
8	Paranormal Intercept Bus 3000 Hidden Side · 2019	$47	-21%	$0.07
9	Shrimp Shack Attack Hidden Side · 2019	$40	-20%	$0.07
10	Supernatural Race Car Hidden Side · 2020	$40	+33%	$0.16
11	J.B.'s Submarine Hidden Side · 2020	$37	+84%	$0.16
12	Wrecked Shrimp Boat Hidden Side · 2019	$36	+18%	$0.11
13	Welcome to the Hidden Side Hidden Side · 2020	$35	+74%	$0.18
14	Graveyard Mystery Hidden Side · 2019	$34	+14%	$0.10
15	El Fuego's Stunt Plane Hidden Side · 2020	$33	+9%	$0.11
16	El Fuego's Stunt Truck Hidden Side · 2019	$25	-37%	$0.06
17	Newbury Subway Hidden Side · 2020	$25	-17%	$0.07
18	J.B.'s Ghost Lab Hidden Side · 2019	$21	+4%	$0.12
19	Jack's Beach Buggy Hidden Side · 2020	$20	+1%	$0.12
20	Newbury Juice Bar Hidden Side · 2020	$19	+46%	$0.15
21	Chef Enzo's Haunted Hotdogs Hidden Side · 2020	$15	—	$0.35
22	Drag Racer Hidden Side · 2020	$15	+14%	$0.11
23	El Fuego's Stunt Cannon Hidden Side · 2020	$12	—	$0.26