It's a bit hard to tell as the pictures are a bit blurry (or doubled?), but I think you may have them back to front? The reverse certainly looks like the legend is the wrong way round. At any rate, what you have there is a Roman denarius, between F and VF grade. I can't identify it right off, but they are nice coins to collect. Surprisingly easy to find and only of limited value (except for rare reigns and types), but a good focus for a collection. As to where to buy - get yourself a copy of Coin News and see where your nearest coin club is. There are also regular fairs, from York in the North, down through the Midlands, to London. What area are you from? And provincial auctions quite often have sales, but don't go buying from those until you are more confident - but great places to go and learn, and watch. There are reputable online dealers - Colin Cooke, Michael Gouby, and Rendel Ingram to name but three. Plus a few of the members here also have websites where they sell, and there are a few coins for sale to be found at the home page of this website. The most important thing though, is to learn more about coins. Read avidly. To drop a few names to go and hunt down at your local reference library : CW Peck English Silver Coinage Freeman's Bronze Coinage Spink's Standard Catalogue Dave Groom's two books on 20th Century silver and bronze varieties