Factory Direct Sale via eBay offers this 20" 6-Speed Folding Bike in Silver for $135.99 with free shipping. That's tied with last week's mention and the lowest total price we've seen for any 20" folding bike. (It's also a current price low for a comparable bike by $29.) It features a steel frame, Shimano derailleur and freewheel, and adjustable seat and bar height.