How to choose disks for a home planetarium?

I am interested in the topic of choosing special disks for a home planetarium. Who also faced with this? Can you tell me where there is a large selection of such discs and at what price?

I've had a home planetarium for a long time now, and I keep ordering them for each of the rooms. It's a great alternative to modern light fixtures. But I order discs through an online store, which is convenient and inexpensive. Look here in this catalog Sega classic stars discs https://astronomix.info/planetarium-discs.html They really have the largest selection

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