I bought a watch a couple weeks ago for my trip to Maui. Wasn't sure if the place I was renting gear included a computer, and I knew I was just doing shallow dives so there was really no need for one. But, I at least wanted something to track my bottom time. IMO, if you want a dive watch (or just a nice looking watch) for next to nothing, look at the Casio MDV-106-1AV ("Duro"). I got the blue and for $60 from Amazon you can't go wrong.
I toyed with the idea of just getting a new battery for my old Citizen dive watch that I wore diving in the 90's, but that thing wasn't keeping great time by the end anyway. And the Duro is just pretty cool looking, I think.