Know-How Exchange : Student Questions

So I am a real estate agent in Georgia and I am looking for good ideas to put on the back of my business card. I was thinking about putting a catchy slogan or quote on the back. I have put some thought into it and have thought about putting something like this:

"It isn't only my job to sell you a home, it's also to be the best among the other 40,000 agents that can"

Let me know your thoughts on that slogan and how I can change it to make it better or any other better slogans or quotes that would look good on the back of a real estate business card. I am also open to other ideas to put on the back so any help would be greatly appreciated! Thanks in advance!