Maybe the b6’s you were thinking were worth $4000 were Schwinn Autocycles that are rarer and the ones worth 4k are usually fully equipped prewar ones. I think $750 for yours would be a good starting price
Man, I know that if this were at the Grand Rapids swap or Ann Arbor with a $500 price tag, it would be gone in 5 minutes. At $750, it would take just a little while, and at a grand it would sit all day with the rest of 'em. That's like it sits now. I really like the looks of it. These ride so sweet.
This bike needs 30 to 40 hours of disassembly cleaning and reassembly and when your done you will have a 6+ original bike without the front brake and you need a seat. I would say $750 would be on the high side. $1500 is dreaming.