photo by Kathleen Gonzalez
Here is a nice collection of models, which somewhat chronicle the progression of gondola design over the centuries.
These little boats were on display in the Emilio Ceccato window at the same time that Kathleen and RJ shot the photos of striped shirts and gondola garb (which can be seen in my post "How Much is that Marinera in the Window?").
You can see some striped shirts in the lower corners of the shot - one with a price tag in view. I don't see any price tags on the gondola models.
My guess is that they're only part of the display and not for sale.