As a new member of this forum, I must admit that I haven’t browsed through all the threads so my question might already have been discussed.
One of my coin “strategies” is to collect an example of all Ceasars/Augusti from Diocletian an onwards, with one “line” for western Rome and one for the eastern Rome. (At several points these two lines will of course overlap.) Some short lived or more anonymous persons are however difficult to find on coin auctions and might not be realistic to look for. I have three specific examples in mind and would be grateful if anyone could give me their thoughts about relative scarcity, and perhaps if they are often very expensive.
My three examples are:
Martinian (Caesar from July to September 324.)
Dalmatius (Caesar from 335-337)
Hannibalianus (Never a Caesar but a nephew of Constantine and later killed by Constantius II like his brother Dalmatius.)