How good are the "cool" beads from temu/ali express

hey so how good are the very intricate knife lanyard beads from temu like the brass storm trooper helmets and those really cool looking beads you find on Amazon for like 20 bucks per bead . they're selling similar looking ones on temu and AliExpress for cents . is it worth the risk has anyone bought them ? how much work do they take to clean up , like is it just the manufacturer selling them for crazy cheap on the whole sale sights?