Well its around 500$ and you can sell it to me hahaha just teasing.
You can sell it on ebay or put an add up at your music store but not alot of musician go to the local music store and watch the billboard for a 15,000$ and up guitar :). Yup thats right 15,000$ and up.

Here's where I got the info. Some of them say that it can go around 20/25k
but seems a bit high.

http://vintage-guitars.blogspot.ca/2006/01/gibson-sg-les-paul-standard.html
http://www.may-studio-music-lessons.com/1963-gibson-les-paul-sg.html
http://www.vintageandrare.com/product/Gibson-SG-Les-Paul-Standard-EBONY-BLOCK-1962-Cherry-Red-21861

Good luck.