Wii Balance Board

The Wii Balance Board is fully functional and shows information in the Activities tab. It connects via bluetooth to the roomba server and shows information coming from the weight sensors onboard. There is a max weight high score achievable, but this became increasingly difficult to reach, since Roomba Rovers weigh just a few pounds. You may just be able to weigh yourself through the poorly calibrated Wii Balance Board

Goodwill probably has plenty of these.