There is a nice looking 60+ year old AMF (Hercules) 3 Speed on the bay (pickup only, not shipping) in Springlakes Michigan for $45
https://www.ebay.com/itm/224508492493
There is a beautiful "Deep Blue" colored Sears FREE SPIRIT "Sheffield" model in Worcester, Mass ("Woo-star", MA )
These were beautifully done as far as the original paint quality and matching painted fenders, and a quality durable heavy steel frame with Ashtabula One Piece Crank.
A really attractive blue color on these 3 speed "Sheffield" models, though they aren't that ancient, my guess is probably circa 1979 to 1983. You can find out exactly by viewing that wishbook site that has begun to upload old Sears & Montgomery Wards, JC Penneys catalogs into individual pdf files. Just Google SEARS Spring Catalog (or alternately Google Sears Fall & Winter, or whatever... Sears Christmas catalog, or Sears Summer Catalog, or Sears Christmas Wishbook............by adding the year, it should bring you the year, if it has been uploaded already into their archives there...................try to then find the INDEX page to find where the bikes or whatever items you are searching are located in that catalog, so you don't have to flip through all 800 pages of each Sears catalog.
--Worcester MA, very nice FREE SPIRIT Sheffield 3 speed on the bay
https://www.ebay.com/itm/304118227252
The Austrian JC HIGGINS in Garnet Valley, PA (Wilmington Delaware metro area) for 29.99 on the bay, also pickup only, not shipping(mentioned in earlier post)
https://www.ebay.com/itm/195236381423
There is a very nice 60+ year old ROYCE UNION 3 speed (currently on Charlotte NC craigslist) for $80 (it is actually located 35 miles east of Charlotte, in Oakboro NC)
The seller of this very nice old ROYCE UNION is a familiar fixture on the Charlotte craigslist, as someone who as a hobby, minimally refurbishes old bikes, and sells them on Charlotte craigs..... that.guy outta Oakboro probably sells about 40 bikes annually there on charlotte craigs.