I live in a house that I could just barely manage to afford the payments on when I bought it 15 years ago that's more than doubled in value since. When I drive home from work I drive by hundreds of houses that are two-three times the size of my house that I _know_ I couldn't afford the payments on if I had to buy it for what it's being appraised at right now (based on actual sales of comparable houses in my neighborhood). I'm doing well, too, and I can't help but wonder... who the hell is buying these houses and where the hell is the money for them coming from?