Amazon UK offers Beverly Hills Cop: Triple Feature on Blu-ray for $5.94 (£4.80). Add it to your cart and the price drops to $4.95 (£4.00) at final checkout. With $3.81 (£3.08) for shipping, that's the lowest total price we could find by $8. It contains Beverly Hills Cop, Beverly Hills Cop II, and Beverly Hills Cop III.
This disc is region-free; the movie will play on US Blu-ray players, but the extras and special features may not. It ships from the UK and should arrive in three to five weeks.