This is a set of majolica tin-glazed earthenware saucers
made from 1960 to 1980 by an artisan pottery in Sao Paulo, Brazil,
exact maker unknown, with a value of $15 per saucer.
Some sites that I recommend for selling are Offerup.com (local), Varagesale.com (local) , Wanelo.com, http://www.decluttr.com, Bonanza.com, Ioffer.com, Etsy.com, Ebay and letgo.com (local).
You can also go to invaluable.com or liveauctioneers.com and search their directory for an auction house near you and consign to them.
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