I found a nice old Sekai 400, not a great bike but pretty much scratchless Tange2 at the curbside while riding last year. I grabbed it pushed both bikes until the next stand of woods and stashed it to pick up after work. Also, I like to bike around town hitting rummage sales in the summer and a couple of years ago I found a nice Mavic Wheelset for 5 bucks, I had to buy it on the spot and ended up riding back one handed holding two wheels in the left hand. Free or cheap doesn't come around all that often and you just have to snatch it up, hopefully you find another freebie soon.