Willo rules as a trash-picking destination because it has become a neighborhood of upper-middle-class strivers who repeatedly replace their old stuff with new, more upscale stuff. Their grail: turning enough of a profit from the eventual sale of their remodeled Willo house to move across Seventh Avenue to tonier Encanto-Palmcroft. Luckily for the poorer among us, the path of Willo's upward mobility is littered with household goods cast aside for no other reason than they didn't come from Pottery Barn. Recent trips through Willo alleys yielded a solid wood front door and an oak table. For best pickings, go the week before Willo's quarterly bulk trash pickup, the last weeks of February, May, August and November. Oh yeah -- technically speaking, Dumpster diving is illegal. And nothing pisses off Willo residents like people trolling through their trash. Watch your back, and don't pull items out of bins and throw them in the alley. Courtesy counts, even for Dumpster divers.