In 1997, LEGO released 4 Western Cowboys sets, all of these sets have been retired. For that year, the total price of all retail sets cost $20, today those sets are valued around $411, a growth of 1959%.
Most valuable 1997 LEGO Western Cowboys set
6799 Showdown Canyon $202.61
Highest growth 1997 Western Cowboys set
6790 Bandit with Gun +2345.23%
4 sets

6706 Frontier Patrol

Theme / Subtheme Western / Cowboys
Year 1997
Pieces / Minifigs 30 / 3
Availability Retired
6706 LEGO Western Cowboys Frontier Patrol
Retail $5.99
Value $125.32
Growth  +1992.2%
Annual growth 6.7%

6790 Bandit with Gun

Theme / Subtheme Western / Cowboys
Year 1997
Pieces / Minifigs 21 / 1
Availability Retired
6790 LEGO Western Cowboys Bandit with Gun
Retail $1.99
Value $48.66
Growth  +2345.2%
Annual growth 7.8%

6791 Bandit's Wheelgun

Theme / Subtheme Western / Cowboys
Year 1997
Pieces / Minifigs 19 / 1
Availability Retired
6791 LEGO Western Cowboys Bandit's Wheelgun
Retail $1.99
Value $34.45
Growth  +1631.2%
Annual growth 6.0%

6799 Showdown Canyon

Theme / Subtheme Western / Cowboys
Year 1997
Pieces / Minifigs 75 / 4
Availability Retired
6799 LEGO Western Cowboys Showdown Canyon
Retail $9.99
Value $202.61
Growth  +1928.1%
Annual growth 8.4%