It's a simple fact. The best way to sell anything is face to face.

When you're literally in the room with a prospect, you can probe for areas of customer interest, read body- language, sell with emotion and personality, answer objections, and most importantly, close the sale.

In the old days, the Fuller Brush man, the Avon Lady, and other intrepid souls would make the rounds and work their magic in person, right in the prospect's living room. (As a young man, I sold door-to-door myself. I thoroughly enjoyed it and it taught me a lot!)