Most Valuable Universal Building Set LEGO Sets of the 1970s

The most valuable Universal Building Set LEGO sets from the 1970s by current market value. This list ranks 19 sets by current BrickPicker value, refreshed from live market data. Right now the top spot belongs to Building Set, 6+ at $494. The top 5 alone account for about 63% of the value on this list. Every entry links to its full price history and marketplace listings. Updated 2026-07-22.

#	Name	Value	Growth	/ piece
1	Building Set, 6+ Universal Building Set · 1977	$494	—	$1.68
2	Universal Building Set Universal Building Set · 1974	$417	+1986%	$1.23
3	Building Set, 6+ Universal Building Set · 1977	$403	—	$0.86
4	Building Set Universal Building Set · 1973	$360	+4463%	$1.07
5	Building Set, 3+ Universal Building Set · 1977	$266	—	$2.03
6	2 Medium Baseplates, Green Universal Building Set · 1971	$228	+7239%	$113.75
7	Tractor Universal Building Set · 1974	$215	+4692%	$2.15
8	Building Set, 3+ Universal Building Set · 1977	$195	—	$0.97
9	Basic Set Universal Building Set · 1973	$121	—	$0.29
10	Building Set, 3+ Universal Building Set · 1977	$93	—	$0.24
11	Building Set, 3+ Universal Building Set · 1977	$50	—	$0.29
12	Building Set Universal Building Set · 1973	$50	—	$0.26
13	Gear set Universal Building Set · 1974	$45	+839%	$0.25
14	2 Large Baseplates, Red/Blue Universal Building Set · 1971	$42	+2156%	$20.87
15	Universal Motor Set Universal Building Set · 1976	$36	—	$1.16
16	Basic Set #8 Universal Building Set · 1973	$20	—	$0.03
17	Gear Set Universal Building Set · 1974	$20	+321%	$0.33
18	2 Large Baseplates, Green/Yellow Universal Building Set · 1971	$19	+947%	$9.69
19	2 Large Baseplates, Grey/White Universal Building Set · 1971	$17	+844%	$8.73