The chairs are not oak,, they are maple !! Both Worthpoint and the site you gave are just selling sites !! I have seen many things on Worthpoint that are neither antique or collectable !! The description is whatever the seller wants to put down !! It is affiliated with Ebay !! I see you have the set listed on Craigslist at $3000.,,any interest from anyone ??
When someone asks what an item is worth they fail to see if it is even selling anywhere at any price !! An item is only worth what someone is willing to pay for it !! No interest means not worth what it is priced at !! No matter what it lists for in any book or what anyones asking price is,,it goes to actual dollars and cents !! Its a volatile market and can change tomorrow but you have to look at it in todays prices !!
Back in the 70`s and 80`s Victorian and Empire Revival furniture sold at a great price !! But today you can hardly give it away !! At the same time Mid Century modern usually went in the trash pile,,today it is one of the best sellers !!