You can get old Allen study material at affordable cost in https://booksya.com/search/node/Allen

Yes sir, i understand your query regarding study material as it is seen in followung official  link of allen as follows:

https://dlp.allen.ac.in/common/about-study-material.asp

The comprehensive study material is prepared by most experienced faculties of ALLEN which focuses on developing advance level skills in student. It intends to provide extensive support in preparation of students for prestigious exam like JEE (Main+Advanced), JEE (Main), Pre-Medical, National/International Olympiads, NTSE, KVPY etc.

The study material is also available for Pre-Nurture (6th to 8th) and Career Foundation (9th & 10th) which aims at building strong foundation among young talent pool.

Study material package focuses on boosting confidence of student for facing National level competition by providing qualitative Questions & solutions, Subject wise & topic wise Question Bank based on latest pattern, in addition to previous year question papers and formula booklets.