Actually, trading can be very attractive, if you can get a week that really is comparable to a week at at DVC -- or better!
I recall that Anita Williams on this board reported that she got a May week in a studio at the Four Seasons Resort Club Aviara in Carlsbad, California, for just 55 points. That's an amazing deal. This timeshare resort shares facilities with the Four Seasons Resort Aviara, where rooms start at around $400 per night in the off season. (May is off season in Southern California.) Just 55 points for a whole week, not per night!
It takes advance planning, homework, and luck.