here in canada thats just what people expect, and nobody cares LOLOL.
hope you find one that works, some can be extra pricey, but for no real reason at all aside from possibly brand.
i doubt head shops will have the kind you need, as most head shops only sell smaller scales that usually have a max weight of anywhere from 150G-700G, heck i found one that went to 1500 but for the most part, walmart or a store that sells kitchen stuff will be your best bet:gj: