I'm not sure if this is a different listing or not, but I did find it on Amazon for only $35.00 which is pretty standard as far as pricing goes. I can't answer for the other places, but if you want to snag a copy, at least it's possible! =)

https://www.amazon.com/Love-Live-Sunshine-School-Movie/dp/B081KR18P4/ref=sr_1_2?dchild=1&keywords=Love+Live+Over+the+rainbow&qid=1611605235&sr=8-2