To charge more for something than it is worth.
The tickets were overpriced, making it hard for fans to afford them.
チケットの価格が高すぎて、ファンたちが購入するのが難しくなりました。
To ask for too much money for something.
The artwork was overpriced, so it didn't sell for a long time.
アート作品の価格が高すぎたため、長い間売れずにいました。