So, who's ready to play "Is it Ona'ah?"http://www.dansdeals.com/archives/35627
From last weeks paper https://www.jewishpress.com/judaism/halacha-hashkafa/is-it-proper-to-take-advantage-of-a-price-mistake-e-g-buy-a-plane-ticket-for-100-when-the-airline-had-meant-500/2022/09/07/No specific mention of DD.