Id from wildwinds Rome, ca. 119–122. IMP CAESAR TRAIAN HA—DRIANVS AVG, laureate head of Hadrian right / P M TR P COS III around, Salus seated left, feeding snake coiled around altar from patera, SAL AVG in exergue. RIC 137.
Some additional information about this coin that would be helpful: - weight in grams - approx. diameter - source of coin (name of dealer or party from whom purchased -- if not a private individual) - price paid (if this isn't too personal)
Here's a similar coin that sold in an auction about a year ago for about $60 U.S., including buyer's fee: It's my personal opinion that the coin you posted appears to be genuine. This is not a rare coin and I would expect that the price for the EBay coin would be similar to the one that I posted above.
Genuine, yes, but I still do not recommend beginners buy coins that they have to ask about here. Either buy from a source you trust or learn enough about the coins that you feel comfortable. I see no reason that this coin would not be a great start for a collection but agree with Ides that it would help to know who is selling it. Known fake sellers should be avoided even if the photos look good.
While it is often possible to condemn a coin as fake from a photograph, it is never possible to positively verify its authenticity from one. Doug's advice above is wise. If nothing else, at least write to the seller and ask for the size and weight before bidding. If the seller can't provide this information, flee.
That coin looks real. It still has the original style of a hadrian portrait, and there are no other signs of a different die or being cast.
Nice looking coin. I'd buy it if I saw it as a show at a reasonable price. It has the pleasing appearance of a coin that saw considerable use in its day. Imagine all who handled that coin. What things did it buy?
Weight and size are within normal range for this type of coin. If you decide to bid in this EBay auction, you might want to compare prices for similar coins by searching on VCoins.com or CNG's e-auctions (you'll find about five of them). Use the search terms "hadrian denarius sal avg" to find them. Be sure to note the condition of the coins relative to the EBay auction coin and adjust your maximum bid accordingly.
