Updated October 16, 2018: Amazon is now price matching.
In my daily review of DNA testing companies, I noticed AncestryDNA has a $69 National Family History Sale going through October 21, 2018. Regular price is $99 although they have been running a $89 sale for a while if you purchase additional kits in the same order (first kit is $99.00 with additional kits being only $89.00). It shows as $99.00 on https://www.ancestry.com/dna/, but when you click on it, it shows the sale price of $69.00. As of October 16, 2018, Amazon is price matching with free shipping: https://www.amazon.com/AncestryDNA-Genetic-Testing/dp/B00TRLVKW0/.
I also noticed it mentioned on http://thednageek.com/ancestrydna-family-history-month-sale/, but I haven’t seen it reported by too many other bloggers yet. I expect that Dick Eastman of EOGN will mention it soon.