Someone has donated a Suunto Gekko Computer to or local charity shop. However no one seems to know what it is or or what it does. As I know the manageress of the shop I said I might be interested as I told her it was a special type of watch to be worn under water. I added it was similar to a Casio. I said I would check on how much they cost but thought they were about £40 new. If I offered £20 do you think that would be a good price for an old Computer.