Kittinger is specialized furniture, and there are experts in the line that can tell you more than I can. I would send your photo set to them (you will need more detailed photos) and see what they would offer. Refinishing is usually pretty easy to see from in-person inspection and it doesn't really hurt the value if its done tight. I can't tell from those photos. First, find out what you have and the demand tor it. Here is one of those companies you can contact.

https://www.kittinger.com/forsale.html

$ 850 is way too cheap from what I know. Good luck!