Finding a buyer for a set of matched bicycles is an incredible long shot but it does happen. I have identical bicycles in The Old Shed right now and would happily accept $150.00 for any of the half dozen or so that hang there.
To that, add this...
The blue man's bicycle pictured was found at a Yard Sale, given to me for free and then sold to a fellow in Australia. He paid between one and two hundred dollars for the bicycle, close to $600.00 for shipping, and another couple of hundred dollars for fumigation/quarantine, before receiving the bicycle.
If you take some time to have a look at
Vintage Bicycle Value, you might be better prepared to offer the bicycles for sale and at a fair price. Good luck with your bikes.