I often do a search on eBay to see what Rondinax tanks are available. This week for the first time in years, the worldwide search using ‘Rondinax’ showed none. Because people (and Agfa in the original German catalogue) get confused and call them ‘Rodinax’, it is worth also searching eBay under that name. This time, one, a 35U appeared. So in the whole world at the moment there is just one Rondinax on eBay.
There is a Rondix (in the USA) which is relatively unusual. Sometimes months go by without one being seen.