I really lucked out on this one. Tag-Heuer happens to be one of the brands of watches that I liked as a kid. I actually don't wear a watch anymore, but I know from years ago that these watches are fine jewelry and can be very expensive.
One of the things t look out for with fine jewelry is fakes. I actually bought a fake Tag-Heuer at a garage sale a couple of years ago. I should have know better. The big giveaway on nice dive watches is the crown. On many dive watches, the crown screws into the watch to keep it waterproof. You have to unscrew the crown and pull it out before you can set the time.
The other thing to know about fine watches is that many of them use a sapphire crystal. This means that the only thing that will scratch the face is a diamond. If you think you are holding a treasure with a scratched face, you probably are not.
This watch retailed for over $1000 when it was new, and it currently sells for $200 - $400 depending on the condition. Mine ends Friday, and the opening bid of $199 has already been met.
I paid $7 for this watch, and it was in the same bin that the "scrap gold buying guy" just finished picking through. He found some sterling silver, but I know he didn't do as well as me!