AncestryDNA has joined the Black Friday competition!
The basic service is 40% off, you can get it for $59 (normally $99) thru Nov 25. There are other options that include the 3 month membership for only $60 or a more expensive one that includes the new Health service.
The 3-month membership for only $1 more is a good deal unless you already have an account with Ancestry. You can do 3 months of research like crazy and then cancel, or if you get addicted like me, continue with a renewal. Your DNA will remain online as will any tree you create.