I an auto repair shop were the owner died and his workers were cleanning out his shop. he must have had about 500 car computers and the workers told me to take what ever I wanted and I ended uup with about 100 of these. they were all about 6" wide and about 8" long, cast aluminum hoseing and the boards were high grade. Like Mechanic said some had like an epoxy that coverd the boards and could not get the boards out off these. I would not buy them unless I could not see them first and then I would not offer him to much for them, maybe .50 or .75 ea. They are a little bit of work but can be worth it. Good luck and let us know what you end up doing.