Cheaper alternatives for Al-Kitaab textbook for learning fusha

Hello everyone, in 2026 I want to apply for Arabic studies at one of the universities in Poland (not this year, because I want to re-take my final exams from high school which is what you need to apply for higher education in my country. My results aren't very good and I already had plans to re-take them). I already got a few books for learning Arabic that were available in my native language, and I already have a slight idea which dialect I want to learn (so far, I settled on Syrian). However, I need some good all around textbook for the fusha. I know a lot of people love using Al-Kitaab, but the book costs almost 140 USD and that's way far more than I can afford. Are there any cheaper alternatives for such a book for fusha? I'd like to hear some of your recommendations. Thank you and have a lovely weekend