Well,
If your offering were in perfect and pristine condition (i.e., just as new) and you found a buyer who has been looking for this exact item for his/her MCM kitchen, you could expect to get maybe a small fortune for it.
However, if your offering has problems and is less than pristine, and the general population has lost it's fascination with built-in wall ovens and surface units (which I think we more-or-less where we find ourselves today), you probably could only expect to get a scrap metal price.
All scenarios in between constitute an infinitely-adjustable sliding scale. In other words, I'm not aware of any Price Guides for vintage appliances. Best to you with your sale.
lawrence