Buy the digital download, and then spend $15 on a used DVD set from a thrift store for the physical nostalgia. Best of both worlds.
Leslie Knope is the heart, yes. But to re-watch the series is to see the beautiful arithmetic of her influence. You see Ron Swanson, a man built like a fortress of solitude, slowly dismantled by the relentless power of friendship. You see April Ludgate grow from a glimmer of apathy into a woman who realizes that caring about things is actually okay.
You can purchase and download the complete series of Parks and Recreation