In 2008, LEGO released 4 Architecture sets across 2 subthemes, all of these sets have been retired. Subthemes for that year included Brickstructures and Landmark Series. For that year, the total price of all retail sets cost $100, today those sets are valued around $2,781, a growth of 2682%.
Most valuable 2008 LEGO Architecture set
19710 Sears Tower $1,333.33
Largest 2008 LEGO Architecture set
19720 John Hancock Center 69 pieces
Most owned 2008 Architecture set
21000 Sears Tower
4 sets

19710 Sears Tower

Theme / Subtheme Architecture / Brickstructures
Year 2008
Pieces 68
Availability Retired
19710 LEGO Architecture Brickstructures Sears Tower
Retail $29.99
Value $1,333.33
Growth  +4345.9%
Annual growth 13.2%

19720 John Hancock Center

Theme / Subtheme Architecture / Brickstructures
Year 2008
Pieces 69
Availability Retired
19720 LEGO Architecture Brickstructures John Hancock Center
Retail $29.99
Value $1,111.07
Growth  +3604.8%
Annual growth 13.7%

21000 Sears Tower

Theme / Subtheme Architecture / Landmark Series
Year 2008
Pieces 69
Availability Retired
21000 LEGO Architecture Sears Tower
Retail $19.99
Value $162.26
Growth  +711.7%
Annual growth 6.9%

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 $173.93
Growth  +770.1%
Annual growth 16.0%