If you want copies to sell, when someone asks what's going on in your life, say you finally got published and you're so excited about it. Then when they say congratulations, say thanks and "YAAAY look for me in Barnes and Noble!" Selling books yourself is tacky, as others have said, and at least this way you come across as excited and you're not giving stuff away. What good would be selling those few books anyway? Yeah you have about 200 bucks in your pocket, but the publisher doesn't count them as books-sold... I frankly just don't see the point. If you really want them to read the book, that's when you give them signed copies for free.