We found 2 Reddit comments about Angel Beats! Complete Collection. Here are the top ones, ranked by their Reddit score.
Well, this is the only official full set I see and it's $60 before shipping https://www.amazon.com/Angel-Beats-Complete-Collection-Shepard/dp/B004XC5LI2/ref=sr_1_1?ie=UTF8&amp;qid=1523149831&amp;sr=8-1&amp;keywords=angel+beats+dvd
I'd say get the bluray if you have something to play it. They're pretty much the same price.