Update: I was wrong. There are additional reductions, but they are a bit different this year. Up to December 9th you can get 5% off orders under $100 using code MERRY5, and 10% of orders over $100 using code Merry10. Makes Y37 $94 and BigY500 $449. There will no doubt be other offers in subsequent weeks, but I wont post them to everyone. If you are panning to order anything let me know and I will let you know what there is that week.
The FTDNA Christmas sale has now begun and runs to December 31st. They have done away with all the special vouchers this year so the offer is quite simple. The tests most relvant to the Warburton Project are:
Y37 at $99, normally $149 when ordered through the project, or £169 full price. You could get an equivalent test at YSEQ for $84, but then the results wouldn’t be incorporated into the Warburton project results page.
BigY500 at $499, normally $649.
For more information of Y-chromosome DNA testing see my DNA Project page, and in particular the first two linked papers: