Also there's a "buy 2, get 1 free" offer on Ancestry DNA kits. You need to use the US site and a US address. But if prepared to do that, it's a nice deal.
The kits are $59 each plus shipping ($9.95 for first kit, $4.95 each for additional kits). The total for three kits will be $137.85 which works out at $46.95 per kit including shipping.