Kenmore Gas Range 79071510400

I bought the range in 05, it started baking poorly 2 years ago. I had the ignitor fixed in February. The tech at that time said this part normally lasts 10 or more years when original. The oven completely stopped working Tuesday. The stovetop works but not the oven. The only advice I get from Sears is to pay another $70+ to have them come look at it again. I bought this brand name product with the expectation of it being quality which it obviously is not. By the time I get done paying for all the repairs, I may have just as well bought a new one. When that happens it will not be from Sears and it will not be a Kenmore.