I bought a Jennings 600 and used it for a while until it just stopped working.
It is a very frustrating scale to use because of the auto shut-off that is very quick. I had to empty the basket and re-tare because it would shut-off on me all the time. Expensive and not that precise!!
When it died I communicated with Jennings for the warranty but the cost of shipping associated with the risk of them not actually covering the failure was too much for me.
I ordered a 0.01 gram scale from Flea-bay for $9.98 shipped from Hong Kong. I have a few calibration weigh and the scale is precise within 0.02g throughout the 300 grams range. Tough to beat the value of that one!
http://cgi.ebay.ca/NEW-300g-x-0-01g-Min...27b9a8d8b1It has been used and abused (dropped on the floor numerous time!!) for over a year and it still works like new. It also has an auto shut-off but it has a reasonable lag!
Disclaimer I have no association with the seller or manufacturer of that scale. I am just a happy customer that wants to share the good news.