Family Tree DNA year end sale is now on.
The Y-DNA test is reduced from $169 to $139 for the 37 marker STR test.
The Family Finder test is reduced from $99 to $89
The mt Full Sequence test is reduced from $199 to $169.
All prices are in US dollars.
There are similar reductions on other tests, see the website.
Every genealogist should have at least a Family Finder (or equivalent) test.