Around 50$, as the others suggested, the Casio Duro is the way to go. This year they even released new model (Pepsi, Batman, Hulk). Check these refs : MDV106B-1A1V ; MDV106B-1A3V ; MDV106B-2AV ; MDV106B-1A2V
Around 100$, the Vostok Amphibia has so many iterations you can literally find anything.
When you get to 200$, there are a lot of options, such as Orient Kamasu, or Citizen Prodiver, (know that the Kamasu is not a certified diver)
If you can afford a 500$ watch, I recommend you take a look at Certina DS Action Diver 38mm, since we are in the period of winter sales, you can find it for 600$. They offer tremendous amount of specs for the money (Certified Diver, Swiss historic brand, 300M water resistance, good quality bracelet, 6 different color schemes) my preferred one is the blue one, which reminds me a lot of the Rolex Smurf :).