Amazon new/used has fair prices, but good Blu-ray movies are still outrageously priced. I don't suspect we'll see any good sales until around Christmas.. then prices will go back up again, then slowly drop thereafter.
you could always sign up with Netflix and get there Blu-ray movies, i think its the same price weather you chose there DVD's, games, or even blu-ray which last i remember was $14.99/mo. much better deal than buying them right now.