There are five different Trixie Belden boxed set by Random House and Golden Books. The first set was published by Golden Books in 1977 and then again later in a paperback format. The set, known as Set A and which is only available in used condition, bears a price of $4.75 on the cover of the main box and contains all of the first editions of the books in the series.
Golden Books released Set B with volumes one through 22, including three new books in the series. Along with the books, the back cover of the set's box contained an invitations for the series' readers to join it Mystery Fan Club.
A subsequent set was released in 1979 or 1980 and included second printings of books 24 and 25 in the series along with a "Mystery Quiz" mini book of quizzes and puzzles. Around the same time, the Trixie Belden gift set was released, containing books 29 through 31 in addition to earlier releases. The final set was released by Random House in 2004. It was a three-book set that included the first three volumes in the series in a hardback format.
Various third-party sellers sell books in the Trixie Belden series on sites, such as eBay and Amazon, as of 2015.