Nintendo Game Boy Line (1989-2008)

Nintendo Game Boy

The Game Boy is an 8-bit handheld game system that features interchangeable cartridge games. The Game Boy was first released in Japan in April 1989, and later moved to North America in July 1989. It had a price of $89.99. It was designed by the same team that designed the Game & Watch consoles released by Nintendo in 1980. The Game Boy was meant to be a "handheld NES". The success of the Game Boy led to the Game Boy Pocket, and later the Game Boy Color. It's best-selling game was Tetris, released in 1989. Nintendo sold 118.69 million units of the Game Boy & Game Boy Color combined by the time they were discontinued in 2003.

Source: Retro Games Plus 

Nintendo Game Boy Advance 

The Game Boy Advance was a 32-bit handheld cartridge-based console released by Nintendo in March 2001. The original model didn't feature a backlit screen, but Nintendo fixed that problem with an updated version, the Game Boy Advance SP, in 2003. It had a price of $99.99 when it was released in 2001. It's best-selling game was Pokemon Ruby & Sapphire, which sold 16.2 million units. The Game Boy Advance was officially discontinued in early 2008 in North America, after 81.5 million units were sold.

Source: Estate Sale