Board Thread:Trade Here/@comment-34584935-20180413113536/@comment-31500798-20180418210240

Actually, they were not released in the beta days. They are on the beta page because most jammers consider them as den betas.

"Even though some of these items aren't actual betas (sold in the Beta Testing Period), the general trading community perceives/considers them so. 'Den Betas' in this case is a term used to describe certain items, albeit an incorrect one.