In 1988, LEGO released 5 Basic sets in the subtheme Universal Building Set, all of these sets have been retired.
Most valuable 1988 LEGO Basic set
1495 Basic Building Set Trial Size $23.51
Highest growth 1988 Basic set
1514 Basic Building Set Trial Size +583.94%
Largest 1988 LEGO Basic set
1577 Basic Set 216 pieces
5 sets

1495 Basic Building Set Trial Size

Theme / Subtheme Basic / Universal Building Set
Year 1988
Pieces 26
Availability Retired
1495 LEGO Basic Building Set Trial Size
Value $23.51

1514 Basic Building Set Trial Size

Theme / Subtheme Basic / Universal Building Set
Year 1988
Pieces 46
Availability Retired
1514 LEGO Basic Building Set Trial Size
Retail $2.49
Value $17.03
Growth  +583.9%
Annual growth 6.8%

1577 Basic Set

Theme Basic
Year 1988
Pieces / Minifigs 216 / 1
Availability Retired
1577 LEGO Basic Set

1617 Small Bucket

Theme Basic
Year 1988
Pieces / Minifigs 149 / 1
Availability Retired
1617 LEGO Small Bucket

1929 Toy Soldier

Theme Basic
Year 1988
Pieces 13
Availability Retired
1929 LEGO Toy Soldier
Value $22.77