I bought a Classic III last year for $60 on CL - real good condition. After selling the fenders and rack on ebay (for $53), and replacing the crank, BB and pedals with lighter components, the weight came in at 28 lbs even. Look around, this is not heavy by folder standards. Add an aluminum seatpost, $42.50 shipped, and a reasonably light seat, say 1/2 lb, and you're below 27 lbs.

I wouldn't recommended the bike for big-mileage commuting, but the fold is very compact, and most of the ones you find for sale have virtually no mileage on them.