Most Valuable System Supplemental LEGO Sets

The most valuable System Supplemental LEGO sets by current market value. This list ranks 50 sets by current BrickPicker value, refreshed from live market data. Right now the top spot belongs to One Light Bulb at $365. The top 5 alone account for about 30% 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	One Light Bulb System · 1969	$365	—	$365.00
2	European Flags System · 1966	$346	—	$43.27
3	4 x 8 Plates, White System · 1966	$300	—	$37.50
4	Lockable Storage Box, Empty System · 1967	$219	+2830%	$21.95
5	Small Wheels with Axles (System) System · 1963	$185	—	$15.39
6	4 Small Wheels with Accessories System · 1969	$177	+1926%	$14.77
7	Six Trees and Bushes System · 1958	$175	+1652%	$29.17
8	1 x 1 Bricks with Letters (System) System · 1966	$173	—	$3.92
9	6 Street Lamps with Curved Top (The Building Toy) System · 1966	$152	—	$25.33
10	6 x 8 & 2 x 8 Plates System · 1956	$135	+3743%	$33.63
11	10 building plates 2 x 8, 4 x 8, 6 x 8 System · 1969	$129	—	$12.90
12	Small Wheels with Axles System · 1966	$100	—	$8.33
13	1 x 4 x 2 Window, Red or White System · 1966	$100	+1894%	$11.06
14	Six Trees and Bushes (The Building Toy) System · 1966	$95	—	$15.83
15	5 Sixteens and 4 Twenties (System) System · 1966	$92	—	$10.28
16	Large Wheels with Axles (System) System · 1964	$92	—	$13.17
17	Shell Station Brick and Sign, 6 Named Beams System · 1966	$89	—	$4.46
18	52 flat tile bricks System · 1969	$80	—	$1.54
19	Traffic Signs System · 1966	$80	+15898%	$5.71
20	2 x 8 Plates, White System · 1966	$80	—	$5.00
21	Lighting Bricks with Color Filters System · 1969	$77	+3307%	$3.33
22	2 Large Wheels with Accessories System · 1969	$70	+192%	$10.00
23	Lighting Device Pack (The Building Toy) System · 1966	$70	+2709%	$23.32
24	8 Pieces 2x8 (The Building Toy) System · 1966	$69	—	$8.63
25	International Flags System · 1958	$62	—	$12.36
26	Garage Plate and Door (The Building Toy) System · 1966	$60	+2310%	$20.00
27	Lighting Device Pack System · 1957	$60	—	$20.00
28	1 x 1 Bricks System · 1955	$59	—	$1.48
29	1 x 1 Bricks with Numbers (System) System · 1966	$58	—	$1.33
30	Baseplate, Gray System · 1964	$58	+3766%	$57.99
31	Nordic and American Flags System · 1966	$58	+4168%	$7.20
32	10 Traffic Signs System · 1969	$57	—	$5.72
33	12 doors and 5 hinges System · 1969	$53	+10400%	$3.09
34	Gates and Fence, White (The Building Toy) System · 1966	$50	—	$2.94
35	2 x 4 Bricks System · 1958	$50	—	$3.85
36	Mixed Plates Parts Pack System · 1955	$50	—	$8.33
37	38 Slimbricks Assorted Sizes System · 1965	$47	—	$1.24
38	1 x 3 x 2 Window, Red or White System · 1966	$46	+1753%	$3.85
39	1 x 2 Bricks System · 1966	$45	—	$1.02
40	4 x 8 & 2 x 8 Plates System · 1956	$45	—	$9.00
41	1 x 2 x 1 Window, Red or White System · 1966	$44	—	$2.33
42	2 x 8 Bricks System · 1958	$42	—	$7.00
43	Windows, White System · 1969	$41	—	$4.14
44	International Flags System · 1957	$38	—	$7.60
45	2 x 3 Bricks (System) System · 1966	$38	—	$1.51
46	1 x 6 x 2 Shuttered Windows, Red or White System · 1966	$37	+470%	$4.63
47	Slopes and Slopes Double 2 x 2, Blue (The Building Toy) System · 1966	$36	—	$1.62
48	1 x 1 x 2 Window, Red or White System · 1966	$35	—	$1.84
49	47 1/3 elements (plates) System · 1969	$35	+311%	$0.74
50	31 bricks with 2, 4 and 6 studs System · 1969	$32	—	$1.02