I went to Helix: https://www.helix.com/ and saw an announcement of up to 50% off. Sale appears to end at 11:59 P. M. U. S. Pacific Time tonight (November 23, 2018). It’s most tests, but it’s not all tests. Discounts tend to range from 20% to 50%.
You can start at https://www.helix.com/pages/store or at https://www.helix.com/collections/all. If you already, or the person you are ordering for, have a Helix DNA kit (or have ordered one even if it hasn’t arrived or been processed yet, sign in as you don’t need to order another Helix kit. The tests include the Geno 2.0 Next – https://www.helix.com/products/national-geographic-geno-2-next-generation; sale price $49.99 with no additional cost if you need a Helix DNA kit for a person (lowest price and rarely offered at this price test they run for National Geographic (Nat Geo). If you previously tested with Nat Geo with a FamilyTree DNA (FTDNA) test, you will need to either change the e-mail on your Nat Geo account or use a different e-mail address (per Nat Geo when I ordered the test a while back).