Browse online for any discount codes. I got my Wiley Test bank for free using some code while purchasing my Gold medal course. You can sometimes find discount code for $200 off or free TB or something like that.
I read BEC and AUD from CPAexcel till now. They are good so far. Especially the bit sized lessons will save a lot of time for few chapters while revising the content. But i feel the lecture videos are boring sometimes (I skip lecture videos for most of the chapters as i prefer reading more than listening). And i do the mcqs from the Wiley test bank before the exams. I felt they are sufficient to pass the exam.