I bought the Philips 5kg scales a while back. Ive found them fine for roast weighing before and after, when bagging etc. However, I do batches of 500g and over, so my scales dont need high precision for my needs.
They have also been great for general kitchen use.
There seem to be a few models around the $15-$30 range kicking around.
If you want the more precise scales to weigh individual shots, then you might need to look at a different type of scale - although, Ive not really tried with mine. They might be able to do it all.
In the past, one set of scales that would do 1g to 7kg to a high precision would have*cost quite a bit. Perhaps the reasonably priced scales can do the 1g increments accurately.
Now Ill have to do some tests with my jewellers scales versus my kitchen scales!