Old Mountain Cast Iron Cookware 7.5"x5.5" Muffin Pan    US $8.95

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Buffalo Cast Iron 5-piece Cookware Set    US $66.94

Lodge Pre-Seasoned 15" Cast-Iron Fry Pan SKILLET Cookware DUTCH Pans Frying Pot    US $58.77

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I wouldn't put it in the oven. However, heat it up on the range and wipe it down with Crisco, or some kind of shorting all over, including the bottom. Make sure when you wash your cast iron skillets, to use as little soap as possible, and dry them on the stove and reapply oil every time. If you do, they will never rust.
*Added tip*
To get stubborn stuck on food off, add water to the skillet and place it on the stove and bring to a boil to soften the mess. Wash as normal.....the food should come right off with a copper scrubber.