Value of a Signed and Highlighted Thomas Kinkade Print?

I have a s/n canvas 18x36 of his Salt Lake City of Lights print, number 12/995. It is highlighted by a master highlighter, highlighted by Thomas Kinkade and hand signed on the back. We saw him sign it at an event in Salt Lake City in 2005 when the painting was released. It is framed. I have the certificate of authenticity for the highlighting by Thomas Kinkade as well as the Certificate of Limitation and Authenticity and the certificate from the master highlighter. I am looking to sell it, but I have no idea what the value is with the highlighting and signature. The only ones I've found online to compare are just s/n prints without the highlighting and signature. Thanks in advance!