books a million deals on bigger orders and what coupons actually work in 2026 for the membership pricing

I am restocking my shelves after a move and bam keeps coming up as cheaper than barnes for hardcovers if you have the membership. But the membership itself is what, 25 a year, so the math gets fuzzy fast.

Anyone running the numbers actively on this? Like if I am buying ten hardcovers in a year does the membership plus available coupons beat just buying used or through ebay sellers. Also any coupons people are using right now that arent the same 10 percent off splash they put on everything.