I have a number of wavy/flow glass windows from 1846. Various sizes in wooden frames. I have no idea what would be a fair price for them
They were removed during the renovation of our house which was built in 1846.
Salvaged glass and windows from 19th century homes is resaleable on the market. They get re-used in a variety of ways and wavy, or hand blown glass panes are a mark of age.
The estimate is per pane or window and is based on actual recent past recorded auction sales of comparables.