CDKeys.com has a 12 month PlayStation Plus membership code available for $33.99 (affiliate link). Delivery is instant via email.
Every month PlayStation Plus members get a few free games (PS4, PS3, and PS Vita). Uncharted 4 and DiRT Rally 2.0 are available free this month.
This is one of the lowest prices I’ve seen for PlayStation Plus, recommend if you own a Sony gaming console.