These are generally priced at $210, although this is the cheapest I've seen them. Free shipping for orders over $100. At $110, they are a no-brainer for squat shoes.
Other colours are available, and when selecting sizes, they should be in US:
Mens
$110 Smash Orange
$110 Solid Acid Yellow
$110 Black / Brown
$110 Cherry Neon
$190 Radiant Aqua / Black (Probably don't get this)
Womens
Why do I need squat shoes?
When doing quad movements (e.g. squats, hacksquats, leg press, etc) the load may be shifted towards the posterior chain (this will be more obvious on taller, longer femur people) and target less of the quads. By having your ankles raised, there is more knee flexion, allowing for greater quad activation and range of motion. You can achieve the same effect by having plates under your ankles although sometimes that may feel awkward. Another bonus is that they are extremely stable to lift in.
Can I do deadlifts in them?
You can, but you probably shouldn't as it shifts your centre of gravity forward (more load on the back and less stable). Most people deadlift in flat shoes (e.g. converse), or just plain barefoot.
I go to the gym casually, and weightlifting/powerlifting/bodybuilding isn't really my main fitness goal
You are probably better off saving your money, and continue with what you are doing. I would honestly only recommend these to people who want to elevate their quad training.
Can I wear these out?
Squat shoes are generally super rigid and stable, so they are not the comfiest shoes to walk around in.
They only weigh 660grams. I need them to be like 120kg before they deserve the title of weightlifting shoes. Jeez.