If a player is just looking for the least expensive, there are plenty of deals from buckets of up to 48 balls (Top Flite) to deals on softer compression balls purchased as two-dozen for a low price. If it matters to you that it performs a little and feels soft, I like the Wilson Duo. Large golf retail stores may be the best place to look.
If one is looking for the higher performing ball but wants to save money, try different balls in the higher performing category and see if cheaper is really better. A more expensive ball may last longer if you don’t lose many golf balls and therefore save money at seasons end.
Finally do a ball fitting or have a discussion with your pro to get the RIGHT ball for you. Many people think the more expensive ball is better but you may not benefit from that ball’s features and therefore waste money.