I don’t understand the US’ overinflation of these discs and why people pay those prices.
You can get them in my country and the UK for a couple of dollars each if you take three seconds to search for yourself; eBay may be simpler, but sometimes it just isn’t worth it.
It’s just an Ebay thing. If you find them individually or in a used DVD store, you can usually find them for less than $20 a piece.