The question is false. Only because a coin is below $1 doesn't mean it's a cheap coin. It also depends on the total supply. If there are a 100 billion coins, do you think $1 is cheap?
I don't think which prices coins are cheap. Because which coin is cheap or expensive it's depends on the circulating supply. 1$ is not a cheap coin in any supply. But max supply is really effect in coin price. 100 billion supply coin never reach 1$.