Antique Settee

Purchased in 2000 from a private party who advised the piece was from the 1800's and at some point in the early 1900's the wheeled feet were added. 

I do not collect antiques so am curious if 1. this actually is an antique and 2. what it may be roughly valued at. 

One of the feet was broken during a move (I have the parts). The rest of it looks as it did when it was purchased. 

Thanks in advance to all who share their knowlege and wisdom!!