@hotwheelsearl is right. There is no A in the legend which I originally thought was MAXIMIANVS, it is in fact Maximinus Daia.
@paschka, I've noticed that you ask about the rarity of every coin you've posted. The answer is always the same: it depends. With ancients, every coin is unique in some way. If, for example, you are collecting emperors, a coin of Septimius Severus with a Victory reverse would be common to you. But a specialist might recognize your coin as having a unique reverse inscription or originating from an obscure eastern mint and consider it a great rarity. Keeping that in mind, you can get some idea of how rare a coin is by going to acsearch.info and searching for other examples. If I go there and search "Maximinus II Genio" I get 863 examples. Your coin was minted in Heraclea. If I add that to the search terms, I get only 53. The mint mark on your coin looks like HTB. If I add that to the search, I get 5 examples. Which is correct, 863, 53 or 5? It depends on what you consider important. You can also do the same thing at vcoins.com to get an idea of what others dealers are asking for similar coins, with the caveat that the condition of an ancient coin has a profound impact on it market value.