I bought the card when I built the PC, but I was planning ahead with the high hopes of running multiple monitors eventually. I had a 1280x1024, which isn't very great by today's standards. It let me do my gaming, though.
Then I got 2 similar monitors, same brand, same native resolution, but other minor differences, off e-bay. Got them used for $20 each. One stand needed some work, they both had a scratch on the surface. Neither flaw limits my enjoyment of having 3 monitors in a row.
It's not just gaming. I use all 3 constantly. Multiple browswer windows, video editing, photoshop, you name it. It allows you to place things where you want/need. Even in a work environment, having that real estate to expand spreadsheets and so-forth is invaluable.
One really big monitor is better than a standard monitor, but IMO having 3 standard monitors is better than one really big monitor.