See this post to get started on lock models and features.
To add to what JD is saying it comes down to what you need, you can get real cheap locks for about $100 but they have very limited features and average quality (think about 1-2 years life). On the other hand if you’re willing to go to $200 you can ANSI Grade 1/2 locks with a ton of features and they’ll last you 5-10 years.