Don't know if this is the place to make swap meet reports, but I'll try.
I did in fact go to Davenport. This is I think about the 2nd largest antique motorcycle meet in the US. About 5% is bicycles.
I've attended it irregularly for 20 years, but this is the first time I sold anything. I got there late Friday. And with no exact understanding of how to become a vendor, I wasted a lot of time in the evening. I did spend about an hour riding my mountain bike around the vendor sites looking at bikes, mostly looking for early lightweight Scwhinns. and I did find a rather nice early 50's high end Schwinn brazed tandem. surprised to see it had 5speed. And curved rear seat tube. (I think all the old high end brazed tandems had that). Bad tires, marked $130. But by the time the rush was over where I was selling old Japanese motorycycle parts, it was gone. Oddly, most all my Kawasaki and Honda parts went to a group of guys from the UK. At breakfast, met a guy that usually attends the Long Beach event. Probably should have got his name, he's probably on here. Good day for me. After 2 hour drive and all that work, I'm ready to sleep for 2 days.