True. But both bikes needed a lot of work. I don't think the Aerocycle was crazy money but it needed a tank door, fenders, rack, seat and who knows what else. By the time all of that is bought you would be pretty close to getting into a decent complete one without all of the headaches. The Bluebird to me, rare or not, was missing almost everything that makes a Bluebird a Bluebird. Not to mention it was one of the later models and in my opinion, much less desirable models. I think a lot of the price on these two bikes in particular have a lot to do with the provenance. Years down the road I'm sure we will be talking about the "Hartung Aerocycle" and the "Hartung Bluebird".