My Walmart scale cost $10, and IIRC, can weigh up to 11#"s (don't know what that is in Kg).
It is several years old, but has held up to daily use. I measure the milk from the goat, and use it for sour-dough bread in the winter. It proved to be accurate to about a gram or two when I had to determine the gold content for a necklace I wanted to sell. The jeweler's scale gave very nearly the same weight.
Hope the new ones are just as good.
ETA: y'all know how to "tare," right? That is what makes the digitals so handy. Turn the scale ON, select for reading in GRAMS, set the empty bowl that will hold the BP onto the scale, and then "zero out" the weight of the bowl. Then, the scale will just give you the weight of the BP.