This is a print and not an original. The painting Late Snow at Riverwood was
done as a piece for the book Somewhere in Time in 1989.
Open (unlimited) versions of the image were made for wall decor, bags, calendars,and several other advertising materials.
The original painting is owned by the publishing company.
This piece has a current value of $20 to $30 a framed wall decor but not as fine art.
Some sites that I recommend for selling are Varagesale.com, Ioffer.com, OfferUp.com, Ebay and letgo.com.
You can also go to invaluable.com or liveauctioneers.com and search their directory for an auction house near you and consign to them.
To finish, I will need you to click the five stars at the top right of your screen and hit the green submit button, thanks!