I just went through the same thing ..
We bought a house for a great deal as well & guess what my stove top was painted 3 times! (can't see it in pic but was bad)with non heat resistant paint.
I guess they think that paint hides an old appliance & yes it does but it makes the appliance un-usable to the new home buyer. I hope someone who has thought about painting the stove (or oven in your case) will read this & use the correct type of paint to do so if they choose that route.
Here's what I did:
I watched my local craigslist & found a free stove & installed it now I can use my stove & it was free. I am redoing my whole kitchen after the first of the year but needed something right away & didn't want to spend much money. Here's a pic of my new stove. I turned right around & gave my old stove away for free & it was gone with in the first two days of posting it on craigslist. It just proves one mans trash is another mans treasure lol.