We've seen this play out before. This couple in Wisconsin stocked up on antique phones when the demand was hot in the 1980s, now they are in their 80s and they can't get rid of them:
They should advertise up here in Canada. Functional rotary phones are selling like hotcakes for $50-80 a pop. Especially original non-standard (not-black) colours.
https://madison.com/news/local/phoneco-wisconsin-telephones-...