When I first looked at your coin, I did initially interpret the date as Μ and a variation of Π or π. But these have values of 40 and 80, which don't make sense as a date. However, qoppa (Ϙ) can look like a 9 when written, and so I think it makes much more sense to interpret the date as ΗϘΡ (Arados year 198, equivalent to 62-61 BC).
I'm not an expert on Hellenistic coins by any means, but the coin type definitely doesn't seem to be rare. Dr. Jules Rouvier describes many coins of this type in his 1900 catalogue “Numismatique des villes de la Phénicie”, starting on page 45. If you go to #331 on page 53, you will find your coin. Given that Dr. Rouvier had two examples in his own collection, with others attested elsewhere, I would say yours is not a rare variant. It's #332 of the same year with last line ΑΣ which might perhaps be less common. (Note that there are some typographical errors in the catalogue, giving incorrect year dates. For example, #285 should be Arados year 169, and #287 should be year 171.)
There's also a 2008 ebook “Arados hellénistique : étude historique et monétaire” by Frédérique Duyrat, which you could perhaps check out if you want to know more. Unfortunately, like Dr. Rouvier's catalogue, you'd need to be able to read French.
If you'd like to look at some other coins of the same type, here's a few. Or just do a Google search for ΑΡΑΔΙΩΝ Tyche coin.
Art Institute Chicago, 95-94 BC
Art Institute Chicago, 80-79 BC
Cornell Coin Collection, 64-63 BC
CoinArchives.com