Caleb Larsen’s A Tool To Deceive and Slaughter is a physical sculpture that is perpetually attempting to auction itself on eBay.
Every ten minutes the black box pings a server on the internet via the ethernet connection to check if it is for sale on the eBay. If its auction has ended or it has sold, it automatically creates a new auction of itself.
If a person buys it on eBay, the current owner is required to send it to the new owner. The new owner must then plug it into ethernet, and the cycle repeats itself.
Basically, it’s a work of art that can only be rented, since your ownership only lasts as long as it takes for someone else to outbid your purchase price.