Amazon UK offers The Last Kingdom: Season 2 on Blu-ray for $5.05 (£3.94). During checkout, it falls to $4.20 (£3.28). With $3.95 (£3.08) for shipping, that's the lowest price we could find by $20.

Note: This Blu-ray set is region-free; the episodes themselves will play on US Blu-ray players, but the extras and special features may not.