Each volume retails for 7000 yen ($65.14 US) plus tax on Bluray and 6000 yen ($55.83 US) plus tax on DVD.
In an official statement on the One-Punch Man TV anime home page, the production staff cites “various difficulties”, apologizes to fans for the delay, and asks for their continued support.
Though he faces new enemies every day, it turns out being devastatingly powerful is actually kind of a bore.