Oven won't heat or clean but broiler works

Just bought a used Fridgidaire stove model CFEF372ECS which is the same as one I have in my winter home. Seller said everything worked fine and I tried all the elements while there. When I got it home and tried the oven to clean it,.......no heat. The broiler works fine though.
They said they just used it the night before and it was working perfectly.
Could something have happened in transit (laid it on its back in the van).

Is this something costly? Contacted the seller who says we can have our money back or will pay half to repair.