MyWeigh KD-8000
8kg capacity accurate to +/- 1 gram. Measures in kg, g, lb, oz, and a Baker's Percentage mode that allows one to weigh an ingredient (flour or meat, for instance) and then measure other ingredients as a percentage of that weight. I picked up one of these on Amazon for $44 with free shipping.
The manual says it doesn't need calibrating, but it can be calibrated, if you choose. You need to purchase a 5kg calibration weight, which costs more than the scales.