The smartchef scales
$1 work well though they require a cell phone app. They are available in 3 capacities with different accuracy levels.
0-500g with 0.01 gram accuracy
0-3kg with 0.1 gram accuracy (the accuracy seems to be 2-3g in practice)
0-15kg with 1 gram accuracy.
I can no longer recommend the My.Weigh VOX 2 talking scale as the most recent unit (the 4th since 2008 but we use it a lot and are not always the best about not dropping it on the floor, etc) failed after only about 3 months. The unit is supposed to have a one year warranty but the manufacturer has been entirely unresponsive.