This depends on many factors: brand, model, condition, location and so on.
But to be clear, while a restored stove is worth thousands, an unrestored stove, no matter what the condition, is only worth a few hundred dollars. There are VERY few exceptions to that rule – a Chambers Imperial or a Magic Chef 6300, for example.
To put hard data on it, between 2021 and 2023, roughly 1000 unrestored Chambers model Cs were on the market in the US (Craigslist, Facebook, Ebay, etc). The average sales price of an unrestored model C across the US was $250. The higher prices were paid for colored porcelain in perfect condition (no blemishes at all). If your stove has chips in it or any damage to the chrome, the value goes down quickly.
Many people will quote you a higher price, but I see no evidence that they sell for those higher prices. I have been watching some stoves sit on the market for years because they are simply priced away from the market. And some will tell you that “it’s worth what someone is willing to pay.” In a way that’s true, but just as there’s a market price for, say, eggs, there’s a market price for stoves. It’s just more obvious to more people what eggs cost. People who want to buy a stove usually do some careful research to see what similar stoves have sold for. So if your price is out of line with that, then your stove will likely sit.
The difference in price between an unrestored stove and a restored one is so great because a restored stove has had an investment of 80+ hours of specialized work, done by a skilled craftsperson. Risks are eliminated, there’s no guesswork in what you’re buying and everything works the way it did when it was new. The same cannot be said for an unrestored stove.
A collector I know uses the rule of thumb “never more than $500 for an unrestored, medium-sized stove.” His guidance should serve as a benchmark for buyers and sellers everywhere.