My go to for DVD's is ebay. You can usually get a huge discount and free shipping, people buy them at estate sales for nothing and make a decent profit. Haven't got a bad used one yet.
Recently watched Hell or High Water and The Highwaymen on Netflix. Enjoyed them both very much. Always liked Costner, and Harrelson plays a great part. Of course, Jeff Bridges always delivers in a wonderfully filmed movie.