We had great success using various Facebook groups to get traffic to the sale. We post before the sale and daily to multiple local Facebook groups. Many companies just post once and the same ad to all the groups.
There are different pictures and text used for the various postings. Many of these people have never been to an estate sale, so it is a totally new world for them to see.
Doing multiple posts increases the chance someone will see the ads. It is not uncommon for us to get over 100 messages asking about various items.
Facebook groups are another way to increase the exposure for your sale.