WAGNER'S 6 1/2 1891 ORIGINAL CAST IRON COOKWARE    US $8.00

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STAUB CAST IRON COOKWARE 2.75 qt Dark Blue Round Cocotte **NEW**    US $94.99

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SAUSAGE PRESS STUFFER CAST IRON OLD VINTAGE ANTIQUE COOKWARE 1897 PATENT 6 QT.    US $71.00

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.