Your set was hand painted sometime between the 1920s to 1945.
See your mark below.
Many misinterpret Replacements dating. What the date 1918 means is that the pattern N876 was first produced in 1918 but has been discontinued since then. Then the actual mark tells us your set was painted between 1920s and 1940s.
Your two pattern set complete has a retail vintage store value of $500-600.
Unfortunately gold decoration adds little to the value of china other than its appearance.
Gold is too hard to extract from porcelain to be of any value.
As for where to sell.....If you want to sell quickly at wholesale prices, try one of these sites.
I do not know where you live so I will make suggestions for three countries.
If you would like to sell closer to retail , some ideas are:
The internet has your largest audience of buyers. Place small ads on these sites or set up your own small store on these sites.
Etsy.com - small fees - 20 cents to list plus 3.5% final price.
Goantiques.com - more upscale fee based
Rubylane.com - more upscale fee based
Amazon Marketplace: http://services.amazon.com/content/sell-on-amazon.htm/ref=footer_soa?ld=AZFSSOA
Another method that could be very effective would be to place a classified in the "Maine Antique Digest" It has a large readership of collectors all across the country.
A private seller to a dealer can expect 30-60% of retail value.
I hope I have helped you.
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