Latest Acquisition From Littleton

a great coin for 20 clams---

Littleton has a general reputation for being "overpriced" (in the sense that you can usually find similar coins for sale elsewhere cheaper), and also for being somewhat awkward to get off their mailing list again should you decide to cease your "membership". There's also the fact that they send coins that happen to be lying about their shop, rather than sending coins you request that are of specific interest to you.

They do not, on the other hand, have a reputation for selling fakes, or anything else outright illegal. Though for ancients, I would always double-check any identification they send as I wouldn't necessarily trust their attribution skills. So they might - might - send you a coin that is genuine but mis-identified. Even highly experienced ancients dealers get identification wrong sometimes. In this particular case, their ID spiel does not seem inaccurate, and is refreshingly free from "hype", though it is perhaps lacking in some details a collector might be interested in. Such as the mintmark, for example. In this case, while a bit unclear from your pics and perhaps partly missing due to the crack, it appears to be BSIRM - Sirmium mint (in modern-day Serbia), second officina.

Would I recommend Littleton as a source for ancient coins? Not really, no - the cons outweigh the pros; I wouldn't recommend them as a source for modern coins, for much the same reasons. However, for those just starting out AND who do not yet have a network of good ancients dealers they can rely on, I suppose you could do worse.