We're stealing this real estate post almost directly from CHS, who discovered Redfin's cool graphs before we did. But we'll refine the focus to condos to avoid outright plagiarism. Redfin's numbers show that since October '06, the number of Capitol Hill condos on the market has ballooned from just over 100 to just under 250 currently. Meanwhile, the average list price has hovered around $475/sq. ft., while actual sales price has declined significantly since last......