With my brother we bought 7250110 in the meantime so I´am doing some digging and I have made a short list of 720/725 units still in existence I´am aware of:
7200014- BA3 M115.954 (Sedan-Motor) should be under restoration in Germany
7200020- BA1 M115.954 (Sedan-Motor) was at GfGmbH in Gotha in April 2020, now might be in collection in Russia
7250103- 230G 5-door general´s cabrio with normal doors, in collection in Augsburg, Germany
7250104- 230G BA6, Original colour 6880, belonged to firefighters in St. Veith a.d. Glan, Austria, decommisioned in 1993, current whereabouts unknown
7250105- BA6 M110, restored in Romania around 2016, now in a collection
7250108- 230G 5- door cabrio, halfdoors like a proto, was at GfGmbh in Gotha in the summer of 2016, türiges Cabrio, current whereabouts unknown
7250109- 230G 5- door cabrio, halfdoors like a proto, Johann Puch Museum, Graz
7250110- 230G BA6, our car
7200111- 230G BA1, in collection in Russia
7200127- 230G BA1, Miami, USA in 2014, current whereabouts unknown
7200131- BA1, OM616.936, many non-original changes, was for sale in Chicago USA in 2021
7200146- BA3, M102+automatic gearbox, amulance rear doors, was at G-Zuna car dealer in Holland
+ 230G 5- door cabrio, halfdoors like a proto, I have seen the car at a military car meet in 2012 but I don´t know the chassis number. It can be 7250102/106/107.
Please add more if you know about them.