Disney Movie Rewards offers Big Hero 6 on Blu-ray / DVD / Digital HD for 2,000 points with free shipping. Assuming you have the points, that's a $15 drop from four days ago, the best deal now by $20, and the lowest price we've seen.
Also available is Tangled on Blu-ray / DVD for 2,000 points with free shipping. Assuming you have the points, that's the lowest total price we could find by $20. (For further comparison, we saw the 3D version for 1,325 points last September.)