AliExpress and eBay. There is a lot of overlap between the two.
Most "make offer" on eBay only take off a few bucks. But may be worth your time to save a buck. AE has promotions at times, even at the store level or using the mobile app. Shop smart.
Warranty? You will pay for it. Many items we use are rebranded (YETI vs RTIC vs Ozark Trail in the steel beverage holder industry, $80 vs $30 vs $10 for the same thing)... if you get a DOA, contact seller or open a claim. If you brick it, likely can find an answer/solution here.