This is an original oil painting by Karoly Gyula "Charles" Gurdon (1927-2003)
a (Hungarian immigrant) Kentucky artist who was an industrial engineer as a profession
but was also a hobby painter on the weekends. This painting
of a sailing ship painted in 1961 has a current value of $200 to $250 retail.
Some sites that I recommend for selling are Varagesale.com, Ioffer.com, OfferUp.com, Ebay and letgo.com
or list ads on these sites; artbrokerage.com, askart.com, artnet.com, artvalue.com, or artprice.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 of your screen and hit the submit button, thanks!