The Legend of Zelda: The Minish Cap Limited Edition was part of the promotion done for the launch of the Game Boy game.
The game was originally available either as a standalone packaged game, or as part of a special pack, which included one of only 25,000 limited edition, Zelda-themed Game Boy Advance SP. The Triforce SP is matte gold in color, with a Triforce logo stamped on the lid, and the Hyrule royal family crest printed on the lower right face. I believe these may have been European only.
Aside from these Zelda Limited Edition Paks available in store, Nintendo created the Limited Edition Collector’s Box, which contained The Minish Cap, the golden Triforce SP, a long-sleeved shirt and a hat. Only 300 boxes were made worldwide and each one is certificated. These Collector’s Boxes were not for sale in stores anywhere, but could only be won or bought in the Nintendo Stars Catalogue for 15,000 stars (which equadled roughly 120 games).
Also, one of these is in the Nintendo World Store signed by Shigeru Miyamoto himself. As a launch promotion, Nintendo Europe also produced seven 24-carat gold plated Game Boy Advance SP consoles, with six given away to people who found a golden ticket inside their Triforce SP package, and a seventh as a magazine promotion.
In 2009 in sold for $1,043.31 and another for $817.10 (570 Euros).
This one is currently $509.11 with eight hours to go.