In 2008, LEGO released 2 Architecture Landmark Series sets, all of these sets have been retired. For that year, the total price of all retail sets cost $40, today those sets are valued around $335, a growth of 738%.
Most valuable 2008 LEGO Architecture Landmark Series set
21001 John Hancock Center $174.75
Largest 2008 LEGO Architecture Landmark Series set
21000 Sears Tower 69 pieces
2 sets

21000 Sears Tower

Theme / Subtheme Architecture / Landmark Series
Year 2008
Pieces 69
Availability Retired
21000 LEGO Architecture Sears Tower
Retail $19.99
Value $160.47
Growth  +702.8%
Annual growth 15.2%

21001 John Hancock Center

Theme / Subtheme Architecture / Landmark Series
Year 2008
Pieces 69
Availability Retired
21001 LEGO Architecture John Hancock Center
Retail $19.99
Value $174.75
Growth  +774.2%
Annual growth 16.0%