Amazon.com: USPS Style W-2812 5Lb Postal Mailing Scale: Office Products
I believe that is the postage scale i bought recently from Amazon and it has worked really, really well.
Good luck! I'm going to be doing 2 cases of Update- I was considering more but I'm still a little scared from Topps 2 (although Update looks better) and I don't have alot of time available around release date. I'm planning on doing 5-6 cases of 2013 Topps 1 for my first case break of that size.