Legend of the Galactic Heroes anime series

It is on Bluray. Sentai Filmworks released a wtfhueg boxset on BD a while back, limited to 1000 copies, for $1000 each (this has to do with Japanese copyright laws and Japanese people generally importing the cheaper Blurays from the USA). The Bluray boxsets ARE available if you import them from Japan, but they're at like $200 a season.

It's also available on streaming services like Hidive. The subtitles for the streaming release as well as the fansubs from the 90s are in varying quality.

Protip, the entire anime got the "special edition" treatment when it was released on DVD. If you're looking to watch it, you're probably going to want to watch the Laserdisc releases; this was enough for me to track down the original LD boxsets.