Koi Fish
$20
Koi fish are colorful ornamental carp commonly kept in backyard ponds by hobbyists.
Estimated value as of 2024 · Source: Average price for assorted Grade-A koi from The Backyard Pond Blog and previous …
Fun Fact
The highest recorded sale price for a single koi fish was $1.8 million in 2018.
Price History
More in Nature
$27 million
Californium-252 (per gram)
Californium-252 is a synthetic radioactive element produced in nuclear reactors, valued as an exceptional neutron source for medical and industrial applications.
$6.1B
Dog Collar
A dog collar is a band worn around a dog's neck, typically made of nylon or leather, used for identification, control, and attaching leashes.
$31.8M
Fossil Tyrannosaurus Rex Skeleton (Stan)
Nearly complete T-Rex skeleton auctioned for research and display.
$5M
Moon Rock Sample (From Apollo 17 Mission)
Lunar basalt specimen collected during humanity's final Apollo mission in 1972.