Decent, in stock suppressor under $500- Do they exist?

I'm having a hell of a time finding a suppressor for the AR pistol I've got coming this week. I'd really like to get something for it this week, but when I find a model that I've decided looks good based on reviews, they're either incredibly expensive or out of stock. This will be my first can, so I really don't know of great sites to look on. Any advice is appreciated, thanks in advance!