60's era Panton Unika Vaev rug  

I have been going through my late father's belongings and have just found what I believe to be a 60's era Panton Unika Vaev rug. It is the exact rug pictured on this website:
www.classic-modern.co.uk/rug13details.htm

The sunburst one pictured in the last image on the page, bottom right and directly above with the red chair. I am wondering about the value of this rug, and what would be the best way to go about selling it. There is also a smaller rug of concentric squares in shades of blue. My mother said the rugs were bought years ago at an estate sale from an older British woman who purchased the rugs in London when she was 'first married'.

I appreciate any help.

http://www.classic-modern.co.uk/rug13details.htm