If you need PlayStation Plus, don’t buy at the regular price. If you wait a bit or look around online, you can usually find a great deal on it for a 12-month subscription. For instance, if you check the PlayStation Store right now, 12-months of PlayStation Plus is currently being offered for $39.99! That’s usually the sweet spot for membership.
I’d probably jump on this now if you need it. Saves you a trip to the store.