Pardon that this reply is late, but I have some good information to add to this thread:
First, I have your coin listed in a database I am compiling for a YN (Young Numismatist) study essay (with dealer permission)
From this, I can tell you that your coin is an AE 15 and weights 5.1 grams.
The dealer graded this as VF, which I disagree with (rough aVF is my opinion)
This coin was listed at 15 Euros, and I would say market rate is ~$30. [nice buy

]
The identification is as follows (using my coin as the example:
Carthage

AE17
370-325BC
Siculo-Punic Mint
(no legend)
Wreathed head of Tanit left
(no legend)
Horse galloping right
17mm
5.5g
gVF
Sassari 56-136, Holleman Munten List 106
Forvm Best of Type
Your coins description should be:
Carthage

AE15
370-325BC
Siculo-Punic Mint
(no legend)
Wreathed head of Tanit left
(no legend)
Horse rearing right
15mm
5.1g
aVF
Sassari 56-136, Holleman Munten List 106
Note: my descriptions for the horse are based on my study, not the (IMHO wrong) modern opinions (too few still have the lines to tell, but I believe that there are three main varieties (I have heard of a fourth, but I need to find one before I say that there is a fourth) of horse movements, which the three here show.
Doucet posted one of the best horse prancing examples I have seen, mine is galloping and yours is rearing.