All four of the Spielberg/Lucas/Ford movies (or all three plus some noise depending on your point of view).
Individual Movies are $8 each, set of all four is $25.
Fifth movie has been pushed back to 2022 so will be a long time before a better bundle.
(If you buy a FandangoNow Gift Card for 30% off today, drops the price under $20 there.)
Also available at:
Vudu [vudu.com] NLA
Amazon has movies at $8 each, but no bundle discount.
Google Play has movies at $10 each and no bundle discount.