catfish
Riding an Alexander Rocket Bike
Up there on the rare list!
How about the Alexander Rocket?
It could be called ugly as Jason sez, but I think it's beautiful, and there aren't many around...less than each of: Bluebird 1 & 2, Aerocycle, and Speedline?
I've never cared for the Aerocycle: I see a streamlined tank attached to an angular motorbike.
For me, CF is increased by rarity, not mass-appeal.